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• Can't install psycopg2 (Python2.6 Ubuntu9.10 PostgreSQL8.4.2)

  - by yuv

  $ ~/psycopg2-2.0.13$ python setup.py install running install running build running build_py creating build creating build/lib.linux-x86_64-2.6 creating build/lib.linux-x86_64-2.6/psycopg2 copying lib/init.py - build/lib.linux-x86_64-2.6/psycopg2 copying lib/pool.py - build/lib.linux-x86_64-2.6/psycopg2 copying lib/extensions.py - build/lib.linux-x86_64-2.6/psycopg2 copying lib/errorcodes.py - build/lib.linux-x86_64-2.6/psycopg2 copying lib/extras.py - build/lib.linux-x86_64-2.6/psycopg2 copying lib/tz.py - build/lib.linux-x86_64-2.6/psycopg2 copying lib/psycopg1.py - build/lib.linux-x86_64-2.6/psycopg2 running build_ext error: No such file or directory or $ sudo easy_install psycopg2==2.0.13 Searching for psycopg2==2.0.13 Reading http;//pypi.python.org/simple/psycopg2/ Reading http;//initd.org/projects/psycopg2 Reading http;//initd.org/pub/software/psycopg/ Best match: psycopg2 2.0.13 Downloading http;//initd.org/pub/software/psycopg/psycopg2-2.0.13.tar.gz Processing psycopg2-2.0.13.tar.gz Running psycopg2-2.0.13/setup.py -q bdist_egg --dist-dir /tmp/easy_install-QuViWt/psycopg2-2.0.13/egg-dist-tmp-P2W9Dh error: Setup script exited with error: No such file or directory thanks in advance

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• Python: shutil.rmtree fails on Windows with 'Access is denied'

  - by Sridhar Ratnakumar

  In Python, when running shutil.rmtree over a folder that contains a read-only file, the following exception is printed: File "C:\Python26\lib\shutil.py", line 216, in rmtree rmtree(fullname, ignore_errors, onerror) File "C:\Python26\lib\shutil.py", line 216, in rmtree rmtree(fullname, ignore_errors, onerror) File "C:\Python26\lib\shutil.py", line 216, in rmtree rmtree(fullname, ignore_errors, onerror) File "C:\Python26\lib\shutil.py", line 216, in rmtree rmtree(fullname, ignore_errors, onerror) File "C:\Python26\lib\shutil.py", line 216, in rmtree rmtree(fullname, ignore_errors, onerror) File "C:\Python26\lib\shutil.py", line 216, in rmtree rmtree(fullname, ignore_errors, onerror) File "C:\Python26\lib\shutil.py", line 216, in rmtree rmtree(fullname, ignore_errors, onerror) File "C:\Python26\lib\shutil.py", line 221, in rmtree onerror(os.remove, fullname, sys.exc_info()) File "C:\Python26\lib\shutil.py", line 219, in rmtree os.remove(fullname) WindowsError: [Error 5] Access is denied: 'build\\tcl\\tcl8.5\\msgs\\af.msg' Looking in File Properties dialog I noticed that af.msg file is set to be read-only. So the question is: what is the simplest workaround/fix to get around this problem - given that my intention is to do an equivalent of rm -rf build/ but on Windows? (without having to use third-party tools like unxutils or cygwin - as this code is targeted to be run on a bare Windows install with Python 2.6 w/ PyWin32 installed)

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• python c extension, problems with dlopen on mac os

  - by Jason Sundram

  I've taken a library that is distributed as a binary lib (.a) and header, written some c++ code against it, and want to wrap the results up in a python module. I've done this here. The problem is that when importing this module on Mac OSX (I've tried 10.5 and 10.6), I get the following error: dlopen(/Library/Python/2.5/site-packages/dirac.so, 2): Symbol not found: _DisposePtr Referenced from: /Library/Python/2.5/site-packages/dirac.so Expected in: dynamic lookup This looks like symbols defined in the Carbon framework aren't being properly resolved, but I'm not sure what to do about that. I am supplying -framework Carbon to distutil.core.Extension's extra_link_args parameter, so I'm not sure what else I should do. Any help would be much appreciated.

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• How do I generate coverage xml report for a single package?

  - by Wraith

  I'm using nose and coverage to generate coverage reports. I only have one package right now, ae, so I specify to only cover that: nosetests -w tests/unit --with-xunit --with-coverage --cover-package=ae And here are the results, which look good: Name Stmts Exec Cover Missing ---------------------------------------------- ae 1 1 100% ae.util 253 224 88% 39, 63-65, 284, 287, 362, 406 ---------------------------------------------- TOTAL 263 234 88% ---------------------------------------------------------------------- Ran 68 tests in 5.292s However when I run coverage xml, coverage pulls in more packages than necessary, including python email and logging packages which have nothing to do with my code. If I run coverage xml ae, I get this error: No source for code: '/home/wraith/dev/projects/trimurti/src/ae': [Errno 21] Is a directory: '/home/wraith/dev/projects/trimurti/src/ae' Is there a way to generate the XML for just the ae package?

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• How can I process command line arguments in Python?

  - by photographer

  What would be an easy expression to process command line arguments if I'm expecting anything like 001 or 999 (let's limit expectations to 001...999 range for this time), and few other arguments passed, and would like to ignore any unexpected? I understand if for example I need to find out if "debug" was passed among parameters it'll be something like that: if 'debug' in argv[1:]: print 'Will be running in debug mode.' How to find out if 009 or 575 was passed? All those are expected calls: python script.py python script.py 011 python script.py 256 debug python script.py 391 xls python script.py 999 debug pdf At this point I don't care about calls like that: python script.py 001 002 245 568 python script.py some unexpected argument python script.py 0001 python script.py 02 ...first one - because of more than one "numeric" argument; second - because of... well, unexpected arguments; third and fourth - because of non-3-digits arguments.

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• shutil.rmtree fails on Windows with 'Access is denied'

  - by Sridhar Ratnakumar

  In Python, when running shutil.rmtree over a folder that contains a read-only file, the following exception is printed: File "C:\ActivePython32Python26\lib\shutil.py", line 216, in rmtree rmtree(fullname, ignore_errors, onerror) File "C:\ActivePython32Python26\lib\shutil.py", line 216, in rmtree rmtree(fullname, ignore_errors, onerror) File "C:\ActivePython32Python26\lib\shutil.py", line 216, in rmtree rmtree(fullname, ignore_errors, onerror) File "C:\ActivePython32Python26\lib\shutil.py", line 216, in rmtree rmtree(fullname, ignore_errors, onerror) File "C:\ActivePython32Python26\lib\shutil.py", line 216, in rmtree rmtree(fullname, ignore_errors, onerror) File "C:\ActivePython32Python26\lib\shutil.py", line 216, in rmtree rmtree(fullname, ignore_errors, onerror) File "C:\ActivePython32Python26\lib\shutil.py", line 216, in rmtree rmtree(fullname, ignore_errors, onerror) File "C:\ActivePython32Python26\lib\shutil.py", line 221, in rmtree onerror(os.remove, fullname, sys.exc_info()) File "C:\ActivePython32Python26\lib\shutil.py", line 219, in rmtree os.remove(fullname) WindowsError: [Error 5] Access is denied: 'build\\pyhg_trunk-win32-x86-hgtip27\\image\\feature-core\\INSTALLDIR\\tcl\\tcl8.5\\msgs\\af.msg' Looking in File Properties dialog I noticed that af.msg file is set to be read-only. So the question is: what is the simplest workaround/fix to get around this problem - given that my intention is to do an equivalent of rm -rf build/ but on Windows? (without having to use unxutils or cygwin)

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• Can I debug with python debugger when using py.test somehow?

  - by Joel

  I am using py.test for unit testing my python program. I wish to debug my test code with the python debugger the normal way (by which i mean pdb.set_trace() in the code) but I can't make it work. Putting pdb.set_trace() in the code doesn't work (raises IOError: reading from stdin while output is captured). I have also tried running py.test with the option --pdb but that doesn't seem to do the trick if I want to explore what happens before my assertion. It breaks when an assertion fails, and moving on from that line means terminating the program. Does anyone know a way to get debugging, or is debugging and py.test just not meant to be together?

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• Why can't I get Python's urlopen() method to work?

  - by froadie

  Why isn't this simple Python code working? import urllib file = urllib.urlopen('http://www.google.com') print file.read() This is the error that I get: Traceback (most recent call last): File "C:\workspace\GarchUpdate\src\Practice.py", line 26, in <module> file = urllib.urlopen('http://www.google.com') File "C:\Python26\lib\urllib.py", line 87, in urlopen return opener.open(url) File "C:\Python26\lib\urllib.py", line 206, in open return getattr(self, name)(url) File "C:\Python26\lib\urllib.py", line 345, in open_http h.endheaders() File "C:\Python26\lib\httplib.py", line 892, in endheaders self._send_output() File "C:\Python26\lib\httplib.py", line 764, in _send_output self.send(msg) File "C:\Python26\lib\httplib.py", line 723, in send self.connect() File "C:\Python26\lib\httplib.py", line 704, in connect self.timeout) File "C:\Python26\lib\socket.py", line 514, in create_connection raise error, msg IOError: [Errno socket error] [Errno 10060] A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond I've tried it with several different pages but I can never get the urlopen method to execute correctly.

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• How can this verbose, unpythonic routine be improved?

  - by fmark

  Is there a more pythonic way of doing this? I am trying to find the eight neighbours of an integer coordinate lying within an extent. I am interested in reducing its verbosity without sacrificing execution speed. def fringe8((px, py), (x1, y1, x2, xy)): f = [(px - 1, py - 1), (px - 1, py), (px - 1, py + 1), (px, py - 1), (px, py + 1), (px + 1, py - 1), (px + 1, py), (px + 1, py + 1)] f_inrange = [] for fx, fy in f: if fx < x1: continue if fx >= x2: continue if fy < y1: continue if fy >= y2: continue f_inrange.append((fx, fy)) return f_inrange

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• Optimizing python code performance when importing zipped csv to a mongo collection

  - by mark

  I need to import a zipped csv into a mongo collection, but there is a catch - every record contains a timestamp in Pacific Time, which must be converted to the local time corresponding to the (longitude,latitude) pair found in the same record. The code looks like so: def read_csv_zip(path, timezones): with ZipFile(path) as z, z.open(z.namelist()[0]) as input: csv_rows = csv.reader(input) header = csv_rows.next() check,converters = get_aux_stuff(header) for csv_row in csv_rows: if check(csv_row): row = { converter[0]:converter[1](value) for converter, value in zip(converters, csv_row) if allow_field(converter) } ts = row['ts'] lng, lat = row['loc'] found_tz_entry = timezones.find_one(SON({'loc': {'$within': {'$box': [[lng-tz_lookup_radius, lat-tz_lookup_radius],[lng+tz_lookup_radius, lat+tz_lookup_radius]]}}})) if found_tz_entry: tz_name = found_tz_entry['tz'] local_ts = ts.astimezone(timezone(tz_name)).replace(tzinfo=None) row['tz'] = tz_name else: local_ts = (ts.astimezone(utc) + timedelta(hours = int(lng/15))).replace(tzinfo = None) row['local_ts'] = local_ts yield row def insert_documents(collection, source, batch_size): while True: items = list(itertools.islice(source, batch_size)) if len(items) == 0: break; try: collection.insert(items) except: for item in items: try: collection.insert(item) except Exception as exc: print("Failed to insert record {0} - {1}".format(item['_id'], exc)) def main(zip_path): with Connection() as connection: data = connection.mydb.data timezones = connection.timezones.data insert_documents(data, read_csv_zip(zip_path, timezones), 1000) The code proceeds as follows: Every record read from the csv is checked and converted to a dictionary, where some fields may be skipped, some titles be renamed (from those appearing in the csv header), some values may be converted (to datetime, to integers, to floats. etc ...) For each record read from the csv, a lookup is made into the timezones collection to map the record location to the respective time zone. If the mapping is successful - that timezone is used to convert the record timestamp (pacific time) to the respective local timestamp. If no mapping is found - a rough approximation is calculated. The timezones collection is appropriately indexed, of course - calling explain() confirms it. The process is slow. Naturally, having to query the timezones collection for every record kills the performance. I am looking for advises on how to improve it. Thanks. EDIT The timezones collection contains 8176040 records, each containing four values: > db.data.findOne() { "_id" : 3038814, "loc" : [ 1.48333, 42.5 ], "tz" : "Europe/Andorra" } EDIT2 OK, I have compiled a release build of http://toblerity.github.com/rtree/ and configured the rtree package. Then I have created an rtree dat/idx pair of files corresponding to my timezones collection. So, instead of calling collection.find_one I call index.intersection. Surprisingly, not only there is no improvement, but it works even more slowly now! May be rtree could be fine tuned to load the entire dat/idx pair into RAM (704M), but I do not know how to do it. Until then, it is not an alternative. In general, I think the solution should involve parallelization of the task. EDIT3 Profile output when using collection.find_one: >>> p.sort_stats('cumulative').print_stats(10) Tue Apr 10 14:28:39 2012 ImportDataIntoMongo.profile 64549590 function calls (64549180 primitive calls) in 1231.257 seconds Ordered by: cumulative time List reduced from 730 to 10 due to restriction <10> ncalls tottime percall cumtime percall filename:lineno(function) 1 0.012 0.012 1231.257 1231.257 ImportDataIntoMongo.py:1(<module>) 1 0.001 0.001 1230.959 1230.959 ImportDataIntoMongo.py:187(main) 1 853.558 853.558 853.558 853.558 {raw_input} 1 0.598 0.598 370.510 370.510 ImportDataIntoMongo.py:165(insert_documents) 343407 9.965 0.000 359.034 0.001 ImportDataIntoMongo.py:137(read_csv_zip) 343408 2.927 0.000 287.035 0.001 c:\python27\lib\site-packages\pymongo\collection.py:489(find_one) 343408 1.842 0.000 274.803 0.001 c:\python27\lib\site-packages\pymongo\cursor.py:699(next) 343408 2.542 0.000 271.212 0.001 c:\python27\lib\site-packages\pymongo\cursor.py:644(_refresh) 343408 4.512 0.000 253.673 0.001 c:\python27\lib\site-packages\pymongo\cursor.py:605(__send_message) 343408 0.971 0.000 242.078 0.001 c:\python27\lib\site-packages\pymongo\connection.py:871(_send_message_with_response) Profile output when using index.intersection: >>> p.sort_stats('cumulative').print_stats(10) Wed Apr 11 16:21:31 2012 ImportDataIntoMongo.profile 41542960 function calls (41542536 primitive calls) in 2889.164 seconds Ordered by: cumulative time List reduced from 778 to 10 due to restriction <10> ncalls tottime percall cumtime percall filename:lineno(function) 1 0.028 0.028 2889.164 2889.164 ImportDataIntoMongo.py:1(<module>) 1 0.017 0.017 2888.679 2888.679 ImportDataIntoMongo.py:202(main) 1 2365.526 2365.526 2365.526 2365.526 {raw_input} 1 0.766 0.766 502.817 502.817 ImportDataIntoMongo.py:180(insert_documents) 343407 9.147 0.000 491.433 0.001 ImportDataIntoMongo.py:152(read_csv_zip) 343406 0.571 0.000 391.394 0.001 c:\python27\lib\site-packages\rtree-0.7.0-py2.7.egg\rtree\index.py:384(intersection) 343406 379.957 0.001 390.824 0.001 c:\python27\lib\site-packages\rtree-0.7.0-py2.7.egg\rtree\index.py:435(_intersection_obj) 686513 22.616 0.000 38.705 0.000 c:\python27\lib\site-packages\rtree-0.7.0-py2.7.egg\rtree\index.py:451(_get_objects) 343406 6.134 0.000 33.326 0.000 ImportDataIntoMongo.py:162(<dictcomp>) 346 0.396 0.001 30.665 0.089 c:\python27\lib\site-packages\pymongo\collection.py:240(insert) EDIT4 I have parallelized the code, but the results are still not very encouraging. I am convinced it could be done better. See my own answer to this question for details.

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• How to merge or copy anonymous session data into user data when user logs in?

  - by benhoyt

  This is a general question, or perhaps a request for pointers to other open source projects to look at: I'm wondering how people merge an anonymous user's session data into the authenticated user data when a user logs in. For example, someone is browsing around your websites saving various items as favourites. He's not logged in, so they're saved to an anonymous user's data. Then he logs in, and we need to merge all that data into their (possibly existing) user data. Is this done different ways in an ad-hoc fashion for different applications? Or are there some best practices or other projects people can direct me to?

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• Django 1.2 + South 0.7 + django-annoying's AutoOneToOneField leads to TypeError: 'LegacyConnection'

  - by konrad

  I'm using Django 1.2 trunk with South 0.7 and an AutoOneToOneField copied from django-annoying. South complained that the field does not have rules defined and the new version of South no longer has an automatic field type parser. So I read the South documentation and wrote the following definition (basically an exact copy of the OneToOneField rules): rules = [ ( (AutoOneToOneField), [], { "to": ["rel.to", {}], "to_field": ["rel.field_name", {"default_attr": "rel.to._meta.pk.name"}], "related_name": ["rel.related_name", {"default": None}], "db_index": ["db_index", {"default": True}], }, ) ] from south.modelsinspector import add_introspection_rules add_introspection_rules(rules, ["^myapp"]) Now South raises the following error when I do a schemamigration. Traceback (most recent call last): File "manage.py", line 11, in <module> execute_manager(settings) File "django/core/management/__init__.py", line 438, in execute_manager utility.execute() File "django/core/management/__init__.py", line 379, in execute self.fetch_command(subcommand).run_from_argv(self.argv) File "django/core/management/base.py", line 196, in run_from_argv self.execute(*args, **options.__dict__) File "django/core/management/base.py", line 223, in execute output = self.handle(*args, **options) File "South-0.7-py2.6.egg/south/management/commands/schemamigration.py", line 92, in handle (k, v) for k, v in freezer.freeze_apps([migrations.app_label()]).items() File "South-0.7-py2.6.egg/south/creator/freezer.py", line 33, in freeze_apps model_defs[model_key(model)] = prep_for_freeze(model) File "South-0.7-py2.6.egg/south/creator/freezer.py", line 65, in prep_for_freeze fields = modelsinspector.get_model_fields(model, m2m=True) File "South-0.7-py2.6.egg/south/modelsinspector.py", line 322, in get_model_fields args, kwargs = introspector(field) File "South-0.7-py2.6.egg/south/modelsinspector.py", line 271, in introspector arg_defs, kwarg_defs = matching_details(field) File "South-0.7-py2.6.egg/south/modelsinspector.py", line 187, in matching_details if any([isinstance(field, x) for x in classes]): TypeError: 'LegacyConnection' object is not iterable Is this related to a recent change in Django 1.2 trunk? How do I fix this? I use this field as follows: class Bar(models.Model): foo = AutoOneToOneField("foo.Foo", primary_key=True, related_name="bar") For reference the field code from django-tagging: class AutoSingleRelatedObjectDescriptor(SingleRelatedObjectDescriptor): def __get__(self, instance, instance_type=None): try: return super(AutoSingleRelatedObjectDescriptor, self).__get__(instance, instance_type) except self.related.model.DoesNotExist: obj = self.related.model(**{self.related.field.name: instance}) obj.save() return obj class AutoOneToOneField(OneToOneField): def contribute_to_related_class(self, cls, related): setattr(cls, related.get_accessor_name(), AutoSingleRelatedObjectDescriptor(related))

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• fabric deploy problem

  - by alexarsh

  Hi, I'm trying to deploy a django app with fabric and get the following error: Alexs-MacBook:fabric alex$ fab config:instance=peergw deploy -H <ip> - u <username> -p <password> [192.168.2.93] run: cat /etc/issue Traceback (most recent call last): File "build/bdist.macosx-10.6-universal/egg/fabric/main.py", line 419, in main File "/Users/alex/Rabota/server/mx30/scripts/fabric/fab/ commands.py", line 37, in deploy checkup() File "/Users/alex/Rabota/server/mx30/scripts/fabric/fab/ commands.py", line 140, in checkup if not 'Ubuntu' in run('cat /etc/issue'): File "build/bdist.macosx-10.6-universal/egg/fabric/network.py", line 382, in host_prompting_wrapper File "build/bdist.macosx-10.6-universal/egg/fabric/operations.py", line 414, in run File "build/bdist.macosx-10.6-universal/egg/fabric/network.py", line 65, in __getitem__ File "build/bdist.macosx-10.6-universal/egg/fabric/network.py", line 140, in connect File "build/bdist.macosx-10.6-universal/egg/paramiko/client.py", line 149, in load_system_host_keys File "build/bdist.macosx-10.6-universal/egg/paramiko/hostkeys.py", line 154, in load File "build/bdist.macosx-10.6-universal/egg/paramiko/hostkeys.py", line 66, in from_line File "build/bdist.macosx-10.6-universal/egg/paramiko/rsakey.py", line 61, in __init__ paramiko.SSHException: Invalid key Alexs-MacBook:fabric alex$ I can't connect to the server via ssh. What can be my problem? Regards, Arshavski Alexander.

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• installing paramiko

  - by fixxxer

  This may sound like a repeated question on SF, but I could not find a clear answer to it, yet.So. I installed Paramiko 1.7 with "setup.py install" command and while running the demo.py program, I got this error: Traceback (most recent call last): File "C:\Documents and Settings\fixavier\Desktop\paramiko-1.7\demos\demo.py", line 33, in <module> import paramiko File "C:\Python26\lib\site-packages\paramiko\__init__.py", line 69, in <module> from transport import randpool, SecurityOptions, Transport File "C:\Python26\lib\site-packages\paramiko\transport.py", line 32, in <module> from paramiko import util File "C:\Python26\lib\site-packages\paramiko\util.py", line 31, in <module> from paramiko.common import * File "C:\Python26\lib\site-packages\paramiko\common.py", line 99, in <module> from Crypto.Util.randpool import PersistentRandomPool, RandomPool ImportError: No module named Crypto.Util.randpool I'm getting this error even after installing PyCrypto 2.1. On running test.py(which comes with the installation), I got the following error - Traceback (most recent call last): File "C:\Documents and Settings\fixavier\Desktop\pycrypto-2.0.1\pycrypto-2.0.1\test.py", line 18, in <module> from Crypto.Util import test File "C:\Documents and Settings\fixavier\Desktop\pycrypto-2.0.1\pycrypto-2.0.1\build/lib.win32-2.6\Crypto\Util\test.py", line 17, in <module> import testdata File "C:\Documents and Settings\fixavier\Desktop\pycrypto-2.0.1\pycrypto-2.0.1\test\testdata.py", line 450, in <module> from Crypto.Cipher import AES ImportError: cannot import name AES I don't have the confidence to go ahead and install AES after all this, for all I know I may get another ImportError! Please advice.Is it the way of installation thats problematic?

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• FancyURLOpener failing since moving to python 3.1.2

  - by Andrew Shepherd

  I had an application that was downloading a .CSV file from a password-protected website then processing it futher. I was using FancyURLOpener, and simply hardcoding the username and password. (Obviously, security is not a high priority in this particular instance). Since downloading Python 3.1.2, this code has stopped working. Does anyone know of the changes that have happened to the implementation? Here is a cut down version of the code: import urllib.request; class TracOpener (urllib.request.FancyURLopener) : def prompt_user_passwd(self, host, realm) : return ('andrew_ee', '_my_unenctryped_password') csvUrl='http://mysite/report/19?format=csv@USER=fred_nukre' opener = TracOpener(); f = opener.open(csvUrl); s = f.read(); f.close(); s; For the sake of completeness, here's the entire call stack: Traceback (most recent call last): File "C:\reporting\download_csv_file.py", line 12, in <module> f = opener.open(csvUrl); File "C:\Program Files\Python31\lib\urllib\request.py", line 1454, in open return getattr(self, name)(url) File "C:\Program Files\Python31\lib\urllib\request.py", line 1628, in open_http return self._open_generic_http(http.client.HTTPConnection, url, data) File "C:\Program Files\Python31\lib\urllib\request.py", line 1624, in _open_generic_http response.status, response.reason, response.msg, data) File "C:\Program Files\Python31\lib\urllib\request.py", line 1640, in http_error result = method(url, fp, errcode, errmsg, headers) File "C:\Program Files\Python31\lib\urllib\request.py", line 1878, in http_error_401 return getattr(self,name)(url, realm) File "C:\Program Files\Python31\lib\urllib\request.py", line 1950, in retry_http_basic_auth return self.open(newurl) File "C:\Program Files\Python31\lib\urllib\request.py", line 1454, in open return getattr(self, name)(url) File "C:\Program Files\Python31\lib\urllib\request.py", line 1628, in open_http return self._open_generic_http(http.client.HTTPConnection, url, data) File "C:\Program Files\Python31\lib\urllib\request.py", line 1590, in _open_generic_http auth = base64.b64encode(user_passwd).strip() File "C:\Program Files\Python31\lib\base64.py", line 56, in b64encode raise TypeError("expected bytes, not %s" % s.__class__.__name__) TypeError: expected bytes, not str

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• ManyToManyField "table exist" error on syncdb

  - by Derek Reynolds

  When I include a ModelToModelField to one of my models the following error is thrown. Traceback (most recent call last): File "manage.py", line 11, in <module> execute_manager(settings) File "/Library/Python/2.6/site-packages/django/core/management/__init__.py", line 362, in execute_manager utility.execute() File "/Library/Python/2.6/site-packages/django/core/management/__init__.py", line 303, in execute self.fetch_command(subcommand).run_from_argv(self.argv) File "/Library/Python/2.6/site-packages/django/core/management/base.py", line 195, in run_from_argv self.execute(*args, **options.__dict__) File "/Library/Python/2.6/site-packages/django/core/management/base.py", line 222, in execute output = self.handle(*args, **options) File "/Library/Python/2.6/site-packages/django/core/management/base.py", line 351, in handle return self.handle_noargs(**options) File "/Library/Python/2.6/site-packages/django/core/management/commands/syncdb.py", line 93, in handle_noargs cursor.execute(statement) File "/Library/Python/2.6/site-packages/django/db/backends/util.py", line 19, in execute return self.cursor.execute(sql, params) File "/Library/Python/2.6/site-packages/django/db/backends/mysql/base.py", line 84, in execute return self.cursor.execute(query, args) File "build/bdist.macosx-10.6-universal/egg/MySQLdb/cursors.py", line 173, in execute File "build/bdist.macosx-10.6-universal/egg/MySQLdb/connections.py", line 36, in defaulterrorhandler _mysql_exceptions.OperationalError: (1050, "Table 'orders_proof_approved_associations' already exists") Field definition: approved_associations = models.ManyToManyField(Association) Everything works fine when I remove the field, and the table is no where in site. Any thoughts as to why this would happen?

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• Yahoo BOSS Python Library, ExpatError

  - by Wraith

  I tried to install the Yahoo BOSS mashup framework, but am having trouble running the examples provided. Examples 1, 2, 5, and 6 work, but 3 & 4 give Expat errors. Here is the output from ex3.py: gpython examples/ex3.py examples/ex3.py:33: Warning: 'as' will become a reserved keyword in Python 2.6 Traceback (most recent call last): File "examples/ex3.py", line 27, in <module> digg = db.select(name="dg", udf=titlef, url="http://digg.com/rss_search?search=google+android&area=dig&type=both&section=news") File "/usr/lib/python2.5/site-packages/yos/yql/db.py", line 214, in select tb = create(name, data=data, url=url, keep_standards_prefix=keep_standards_prefix) File "/usr/lib/python2.5/site-packages/yos/yql/db.py", line 201, in create return WebTable(name, d=rest.load(url), keep_standards_prefix=keep_standards_prefix) File "/usr/lib/python2.5/site-packages/yos/crawl/rest.py", line 38, in load return xml2dict.fromstring(dl) File "/usr/lib/python2.5/site-packages/yos/crawl/xml2dict.py", line 41, in fromstring t = ET.fromstring(s) File "/usr/lib/python2.5/xml/etree/ElementTree.py", line 963, in XML parser.feed(text) File "/usr/lib/python2.5/xml/etree/ElementTree.py", line 1245, in feed self._parser.Parse(data, 0) xml.parsers.expat.ExpatError: syntax error: line 1, column 0 It looks like both examples are failing when trying to query Digg.com. Here is the query that is constructed in ex3.py's code: diggf = lambda r: {"title": r["title"]["value"], "diggs": int(r["diggCount"]["value"])} digg = db.select(name="dg", udf=diggf, url="http://digg.com/rss_search?search=google+android&area=dig&type=both&section=news") Any help is appreciated. Thanks!

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• Python doctest error

  - by user74283

  Hi I recently started experimenting with python currently reading "Think like a computer scientist: Learning python v2nd edition" I have been having some trouble with doctest. I use a windows 7 machine and Eclipse IDE with pydev. My question is when i run the script below i get the error below. Said script is below the the error message Traceback (most recent call last): File "C:\Users\shaytac\PythonProjects\test.py", line 21, in doctest.testmod() File "C:\Python26\lib\doctest.py", line 1829, in testmod for test in finder.find(m, name, globs=globs, extraglobs=extraglobs): File "C:\Python26\lib\doctest.py", line 852, in find self._find(tests, obj, name, module, source_lines, globs, {}) File "C:\Python26\lib\doctest.py", line 906, in _find globs, seen) File "C:\Python26\lib\doctest.py", line 894, in _find test = self._get_test(obj, name, module, globs, source_lines) File "C:\Python26\lib\doctest.py", line 978, in _get_test filename, lineno) File "C:\Python26\lib\doctest.py", line 597, in get_doctest return DocTest(self.get_examples(string, name), globs, File "C:\Python26\lib\doctest.py", line 611, in get_examples return [x for x in self.parse(string, name) File "C:\Python26\lib\doctest.py", line 573, in parse self._parse_example(m, name, lineno) File "C:\Python26\lib\doctest.py", line 631, in _parse_example self._check_prompt_blank(source_lines, indent, name, lineno) File "C:\Python26\lib\doctest.py", line 718, in _check_prompt_blank line[indent:indent+3], line)) ValueError: line 2 of the docstring for main.compare lacks blank after : 'compare(5, 4) ' def compare(a, b): """ >>>compare(5, 4) 1 >>>compare(7, 7) 0 >>>compare(2, 3) -1 >>>compare(42, 1) 1 """ if a > b : return 1 if a == b : return 0 if a < b : return -1 if __name__ == '__main__': import doctest doctest.testmod()

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• Javascript with Django?

  - by Rosarch

  I know this has been asked before, but I'm having a hard time setting up JS on my Django web app, even though I'm reading the documentation. I'm running the Django dev server. My file structure looks like this: mysite/ __init__.py MySiteDB manage.py settings.py urls.py myapp/ __init__.py admin.py models.py test.py views.py templates/ index.html Where do I want to put the Javascript and CSS? I've tried it in a bunch of places, including myapp/, templates/ and mysite/, but none seem to work. From index.html: <head> <title>Degree Planner</title> <script type="text/javascript" src="/scripts/JQuery.js"></script> <script type="text/javascript" src="/media/scripts/sprintf.js"></script> <script type="text/javascript" src="/media/scripts/clientside.js"></script> </head> From urls.py: (r'^admin/', include(admin.site.urls)), (r'^media/(?P<path>.*)$', 'django.views.static.serve', {'document_root': 'media'}) (r'^.*', 'mysite.myapp.views.index'), I suspect that the serve() line is the cause of errors like: TypeError at /admin/auth/ 'tuple' object is not callable Just to round off the rampant flailing, I changed these settings in settings.py: MEDIA_ROOT = '/media/' MEDIA_URL = 'http://127.0.0.1:8000/media'

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• Running Flask framework on App Engine: Could not find module app.cgi

  - by Linc

  I'm running this Flask example app on App Engine: http://github.com/gigq/flasktodo You can see on the github page that app.cgi is in the main directory for this project. However, when I run this code I get an error complaining about a missing app.cgi: ERROR 2010-05-01 16:43:47,006 dev_appserver.py:2109] Encountered error loading module "app.cgi": <type 'exceptions.ImportError'>: Could not find module app.cgi Traceback (most recent call last): File "/opt/google_appengine/google/appengine/tools/dev_appserver.py", line 2096, in LoadTargetModule module_code = import_hook.get_code(module_fullname) File "/opt/google_appengine/google/appengine/tools/dev_appserver.py", line 1279, in Decorate return func(self, *args, **kwargs) File "/opt/google_appengine/google/appengine/tools/dev_appserver.py", line 1956, in get_code full_path, search_path, submodule = self.GetModuleInfo(fullname) File "/opt/google_appengine/google/appengine/tools/dev_appserver.py", line 1279, in Decorate return func(self, *args, **kwargs) File "/opt/google_appengine/google/appengine/tools/dev_appserver.py", line 1908, in GetModuleInfo submodule, search_path = self.GetParentSearchPath(fullname) File "/opt/google_appengine/google/appengine/tools/dev_appserver.py", line 1279, in Decorate return func(self, *args, **kwargs) File "/opt/google_appengine/google/appengine/tools/dev_appserver.py", line 1887, in GetParentSearchPath parent_package = self.GetParentPackage(fullname) File "/opt/google_appengine/google/appengine/tools/dev_appserver.py", line 1279, in Decorate return func(self, *args, **kwargs) File "/opt/google_appengine/google/appengine/tools/dev_appserver.py", line 1864, in GetParentPackage raise ImportError('Could not find module %s' % fullname) ImportError: Could not find module app.cgi How do I indicate to dev_appserver.py where to look to find it?

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• Scapy install issues. Nothing seems to actually be installed?

  - by Chris

  I have an apple computer running Leopard with python 2.6. I downloaded the latest version of scapy and ran "python setup.py install". All went according to plan. Now, when I try to run it in interactive mode by just typing "scapy", it throws a bunch of errors. What gives! Just in case, here is the FULL error message.. INFO: Can't import python gnuplot wrapper . Won't be able to plot. INFO: Can't import PyX. Won't be able to use psdump() or pdfdump(). ERROR: Unable to import pcap module: No module named pcap/No module named pcapy ERROR: Unable to import dnet module: No module named dnet Traceback (most recent call last): File "/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/runpy.py", line 122, in _run_module_as_main "__main__", fname, loader, pkg_name) File "/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/runpy.py", line 34, in _run_code exec code in run_globals File "/Users/owner1/Downloads/scapy-2.1.0/scapy/__init__.py", line 10, in <module> interact() File "scapy/main.py", line 245, in interact scapy_builtins = __import__("all",globals(),locals(),".").__dict__ File "scapy/all.py", line 25, in <module> from route6 import * File "scapy/route6.py", line 264, in <module> conf.route6 = Route6() File "scapy/route6.py", line 26, in __init__ self.resync() File "scapy/route6.py", line 39, in resync self.routes = read_routes6() File "scapy/arch/unix.py", line 147, in read_routes6 lifaddr = in6_getifaddr() File "scapy/arch/unix.py", line 123, in in6_getifaddr i = dnet.intf() NameError: global name 'dnet' is not defined

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• Rebuilding old (2010) django project in 2012

  - by birgit

  I am trying to make an old Django project run again. After seemingly having solved issues with old sorl.thumbnail versions and deprecated expressions I now get this error when running python manage.py runserver I also tried to copy & paste my old files into a new Django project and get the exactly same error. Maybe someone here has a clue where the problem lies? Unhandled exception in thread started by <bound method Command.inner_run of <django.contrib.staticfiles.management.commands.runserver.Command object at 0x2a80510>> Traceback (most recent call last): File "/usr/lib/python2.7/dist-packages/django/core/management/commands/runserver.py", line 88, in inner_run self.validate(display_num_errors=True) File "/usr/lib/python2.7/dist-packages/django/core/management/base.py", line 249, in validate num_errors = get_validation_errors(s, app) File "/usr/lib/python2.7/dist-packages/django/core/management/validation.py", line 35, in get_validation_errors for (app_name, error) in get_app_errors().items(): File "/usr/lib/python2.7/dist-packages/django/db/models/loading.py", line 146, in get_app_errors self._populate() File "/usr/lib/python2.7/dist-packages/django/db/models/loading.py", line 61, in _populate self.load_app(app_name, True) File "/usr/lib/python2.7/dist-packages/django/db/models/loading.py", line 78, in load_app models = import_module('.models', app_name) File "/usr/lib/python2.7/dist-packages/django/utils/importlib.py", line 35, in import_module __import__(name) File "/home/me/Documents/wdws/wdws/../wdws/cityofwindows/models.py", line 73, in <module> class Image(models.Model): File "/home/me/Documents/wdws/wdws/../wdws/cityofwindows/models.py", line 83, in Image 'large': {'size': (640, 640)}, File "/usr/lib/python2.7/dist-packages/django/db/models/fields/files.py", line 233, in __init__ super(FileField, self).__init__(verbose_name, name, **kwargs) TypeError: __init__() got an unexpected keyword argument 'extra_thumbnails' I need to re-build the project just for visual documentation locally... so also any hints on how to quickly re-run outdated django-projects are very welcome!! Thanks a lot (using Ubuntu 12.04)

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• How do I work around this problem creating a virtualenv environment with a custom-build Python?

  - by Daryl Spitzer

  I need to run some code on a Linux machine with Python 2.3.4 pre-installed. I'm not on the sudoers list for that machine, so I built Python 2.6.4 into (a subdirectory in) my home directory. Then I attempted to use virtualenv (for the first time), but got: $ Python-2.6.4/python virtualenv/virtualenv.py ENV New python executable in ENV/bin/python Could not find platform dependent libraries <exec_prefix> Consider setting $PYTHONHOME to <prefix>[:<exec_prefix>] Installing setuptools......... Complete output from command /apps/users/dspitzer/ENV/bin/python -c "#!python \"\"\"Bootstrap setuptoo... " /apps/users/dspitzer/virtualen...6.egg: Could not find platform dependent libraries <exec_prefix> Consider setting $PYTHONHOME to <prefix>[:<exec_prefix>] 'import site' failed; use -v for traceback Traceback (most recent call last): File "<string>", line 67, in <module> ImportError: No module named md5 ---------------------------------------- ...Installing setuptools...done. Traceback (most recent call last): File "virtualenv/virtualenv.py", line 1488, in <module> main() File "virtualenv/virtualenv.py", line 529, in main use_distribute=options.use_distribute) File "virtualenv/virtualenv.py", line 619, in create_environment install_setuptools(py_executable, unzip=unzip_setuptools) File "virtualenv/virtualenv.py", line 361, in install_setuptools _install_req(py_executable, unzip) File "virtualenv/virtualenv.py", line 337, in _install_req cwd=cwd) File "virtualenv/virtualenv.py", line 590, in call_subprocess % (cmd_desc, proc.returncode)) OSError: Command /apps/users/dspitzer/ENV/bin/python -c "#!python \"\"\"Bootstrap setuptoo... " /apps/users/dspitzer/virtualen...6.egg failed with error code 1 Should I be setting PYTHONHOME to some value? (I intentionally named my ENV "ENV" for lack of a better name.) Not knowing if I can ignore those errors, I tried installing nose (0.11.1) into my ENV: $ cd nose-0.11.1/ $ ls AUTHORS doc/ lgpl.txt nose.egg-info/ selftest.py* bin/ examples/ MANIFEST.in nosetests.1 setup.cfg build/ functional_tests/ NEWS PKG-INFO setup.py CHANGELOG install-rpm.sh* nose/ README.txt unit_tests/ $ ~/ENV/bin/python setup.py install Could not find platform dependent libraries <exec_prefix> Consider setting $PYTHONHOME to <prefix>[:<exec_prefix>] Traceback (most recent call last): File "setup.py", line 1, in <module> from nose import __version__ as VERSION File "/apps/users/dspitzer/nose-0.11.1/nose/__init__.py", line 1, in <module> from nose.core import collector, main, run, run_exit, runmodule File "/apps/users/dspitzer/nose-0.11.1/nose/core.py", line 3, in <module> from __future__ import generators ImportError: No module named __future__ Any advice?

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• ObjectListView: Custom Sorter

  - by Mike

  In the control ObjectListView(http://objectlistview.sourceforge.net/html/cookbook.htm), I'm trying to add a custom sorter where it ignores "The" and "A" prefixes. I managed to do it with a regular ListView, but now that I switched to ObjectListView(a lot more features, and ease), I can't seem to do the same. The following is the Main comparer in the ObjectListView code i think... public int Compare(object x, object y) { return this.Compare((OLVListItem)x, (OLVListItem)y); } Original Sorter for ascending, as an example (Ignoring "A" and "The") public class CustomSortAsc : IComparer { int IComparer.Compare(Object x, Object y) { string[] px = Convert.ToString(x).Split(' '); string[] py = Convert.ToString(y).Split(' '); string newX = ""; string newY = ""; for (int i = 0; i < px.Length; i++) { px[i] = px[i].Replace("{", ""); px[i] = px[i].Replace("}", ""); } for (int i = 0; i < py.Length; i++) { py[i] = py[i].Replace("{", ""); py[i] = py[i].Replace("}", ""); } if ((px[1].ToLower() == "a") || (px[1].ToLower() == "the")) { if (px.Length > 1) { for (int i = 2; i < px.Length; i++) newX += px[i]; } } else { for (int i = 1; i < px.Length; i++) newX += px[i]; } if ((py[1].ToLower() == "a") || (py[1].ToLower() == "the")) { if (py.Length > 1) { for (int i = 2; i < py.Length; i++) newY += py[i]; } } else { for (int i = 1; i < py.Length; i++) newY += py[i]; } return ((new CaseInsensitiveComparer()).Compare(newX, newY)); }

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• Python read multiline JSON

  - by Paul W

  I have been trying to use JSON to store settings for a program. I can't seem to get Python 2.6 's JSON Decoder to decode multi-line JSON strings... Here is example input: .settings file: """ {\ 'user':'username',\ 'password':'passwd',\ }\ """ I have tried a couple other syntaxes for this file, which I will specify below (with the traceback they cause). My python code for reading the file in is import json settings_text = open(".settings", "r").read() settings = json.loads(settings_text) The Traceback for this is: Traceback (most recent call last): File "json_test.py", line 4, in <module> print json.loads(text) File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/json/__init__.py", line 307, in loads return _default_decoder.decode(s) File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/json/decoder.py", line 322, in decode raise ValueError(errmsg("Extra data", s, end, len(s))) ValueError: Extra data: line 1 column 2 - line 7 column 1 (char 2 - 41) I assume the "Extra data" is the triple-quote. Here are the other syntaxes I have tried for the .settings file, with their respective Tracebacks: "{\ 'user':'username',\ 'pass':'passwd'\ }" Traceback (most recent call last): File "json_test.py", line 4, in <module> print json.loads(text) File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/json/__init__.py", line 307, in loads return _default_decoder.decode(s) File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/json/decoder.py", line 319, in decode obj, end = self.raw_decode(s, idx=_w(s, 0).end()) File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/json/decoder.py", line 336, in raw_decode obj, end = self._scanner.iterscan(s, **kw).next() File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/json/scanner.py", line 55, in iterscan rval, next_pos = action(m, context) File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/json/decoder.py", line 155, in JSONString return scanstring(match.string, match.end(), encoding, strict) ValueError: Invalid \escape: line 1 column 2 (char 2) '{\ "user":"username",\ "pass":"passwd",\ }' Traceback (most recent call last): File "json_test.py", line 4, in <module> print json.loads(text) File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/json/__init__.py", line 307, in loads return _default_decoder.decode(s) File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/json/decoder.py", line 319, in decode obj, end = self.raw_decode(s, idx=_w(s, 0).end()) File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/json/decoder.py", line 338, in raw_decode raise ValueError("No JSON object could be decoded") ValueError: No JSON object could be decoded If I put the settings all on one line, it decodes fine.

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