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  • Sending messages between two Python servers

    - by Will
    I have two servers - one Django, the other likely to be written in Python - and one is putting 'tasks' into a database and another is processing these tasks. They share a database, but I want the processor to react quickly to new tasks rather than polling periodically. Are there any straightforward ways for two Python servers to talk to one another, or does the task processor have to have web-hooks or something? It feels there ought to be a blessed way to do this...

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  • multi threading python/ruby vs java?

    - by fayer
    i wonder if the multi threading in python/ruby is equivalent to the one in java? by that i mean, is it as efficient? cause if you want to create a chat application that use comet technology i know that you have to use multi threading. does this mean that i can use python or ruby for that or is it better with java? thanks

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  • why am i getting an error SyntaxError : invalid syntax for this code

    - by eragon1189
    This is a code in python which calculates f (x) =? ((-1)*x)/(x*x+n*n) n from 1 to infinite.... correct to 0.0001, for the range 1 < x < 100 in steps of 0.1.But i am getting an syntax error,as i am new to programming in python... from scipy import * from matplotlib.pyplot import * x=arange(0.1,100,0.1) f=zeros(len(x)) s=-1 for n in range (1,10000): t=s*x/(x*x+n*n) f +=t s =-s if max(abs(t))< 1e-4 break for xx in c_[x,f]: print "%f %f" % (xx[0],xx[1])

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  • catch output from linux telnet to a python script

    - by sandra
    Hello. My problem is that i want to do something like this in linux console telnet 192.168.255.28 process.py i.e i would like to do some transformation with console telnet output using python script. I'm see Popen in python for this case, but i can't understand how can i get input from telnet if it do not stop all time.. Pleas any ideas.

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  • Is it possible to use os.walk over SSH?

    - by LeoB
    I'm new to Python so forgive me if this is basic, I've searched but can't find an answer. I'm trying to convert a Perl script into Python (3.x) which connects to a remote server and copies the files in a given directory to the local machine. Integrity of the transfer is paramount and there are several steps built-in to ensure a complete and accurate transfer. The first step is to get a complete listing of the files to be passed to rsync. The Perl script has the following lines to accomplish this: @dir_list = `ssh user@host 'find $remote_dir -type f -exec /bin/dirname {} \\;'`; @file_list = `ssh user@host 'find $remote_dir -type f -exec /bin/basename {} \\;'`; The two lists are then joined to create $full_list. Rather than open two separate ssh instances I'd like to open one and use os.walk to get the information using: for remdirname, remdirnames, remfilesnames in os.walk(remotedir): for remfilename in remfilesnames: remfulllist.append(os.path.join(remdirname, remfilename)) Thank you for any help you can provide.

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  • XSD editor with the ability to write plugins in Python

    - by Tomasz Zielinski
    I'm writing a Python module for parsing XSD for very specific purpose. Currently it's a console program, but ideally I would see it plugged inside some XSD editor - not only for convenience of end users, but also for fetching XSD parsed into Python objects - this would save me days or weeks of work. Is there any such editor on the market?

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  • Python and MySQL

    - by omfgroflmao
    Is there an easy way (without downloading any plugins) to connect to a MySQL database in Python? Also, what would be the difference from calling a PHP script to retrieve the data from the database and hand it over to Python and importing one of these third-parties plugins that requires some additional software in the server.

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  • Python/Ruby IDE (Windows)?

    - by Lee Tang
    Are there any Windows IDEs that support both Ruby and Python? I'm talking about the type of IDE that has syntax suggestions (auto-completion feature). I've tried Netbeans but it only seems to support Ruby (maybe there's a way to add Python support?)

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  • Why is i++++++++i valid in python?

    - by SysAdmin
    I "accidentally" came across this weird but valid syntax i=3 print i+++i #outputs 6 print i+++++i #outputs 6 print i+-+i #outputs 0 print i+--+i #outputs 6 (for every even no: of minus symbol, it outputs 6 else 0, why?) Does this do anything useful? Update (Don't take it the wrong way..I love python): One of Python's principle says There should be one-- and preferably only one --obvious way to do it. It seems there are infinite ways to do i+1

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  • C++ Arrays manipulations (python-like operations)

    - by Linai
    Hi Guys, I'm trying to figure out the best C++ library/package for array manipulations in a manner of python. Basically I need a simplicity like this: values = numpy.array(inp.data) idx1 = numpy.where(values > -2.14) idx2 = numpy.where(values < 2.0) res1 = (values[idx1] - diff1)/1000 res1 = (values[idx2] - diff2)*1000 In python it's just 5 lines, but the simplest way in C++ i can think of is quite a number of nested loops. Pls advise..

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  • importing class and its function from another file [Python]

    - by user343934
    Hi everyone, I am having little bit problem in importing classes in python. My work flow goes like this -index.py ---class template: ------def header(): ------def body(): ------def footer(): -display.py I want to call function header(), body() and footer () in my display.py page. Will anyone make me clear about this issue in python. Thanks for your concern.

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  • Why is Python so slow?

    - by Riemannliness
    Why is Python such a slow language, on average, compared to C/C++? I learned Python as my first programming language, but I've only just started with C and already I can feel and see the difference.

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  • python copytree with negated ignore pattern

    - by Chris H
    I'm trying to use python to copy a tree of files/directories. is it possible to use copytree to copy everything that ends in foo? There is an ignore_patterns patterns function, can I give it a negated regular expression? Are they supported in python? eg. copytree(src, dest, False, ignore_pattern('!*.foo')) Where ! means NOT anything that ends in foo. thanks.

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  • Python/Django tests running only one test at a time

    - by user2876296
    I have a unittest for my view class TestFromAllAdd(TestCase): fixtures = ['staging_accounts_user.json', 'staging_main_category.json', 'staging_main_dashboard.json', 'staging_main_location.json', 'staging_main_product.json', 'staging_main_shoppinglist.json'] def setUp(self): self.factory = RequestFactory() self.c = Client() self.c.login(username='admin', password='admin') def from_all_products_html404_test(self): request = self.factory.post('main/adding_from_all_products', {'product_id': ''}) request.user = User.objects.get(username= 'admin') response = adding_from_all_products(request) self.assertEqual(response.status_code, 404) But I have a few more classes with tests and I cant run them all at the same time: python manage.py test main doesnt run tests, but if i run; python manage.py test main.TestFromAllAdd.from_all_products_html404_test , runs one test;

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  • Persistent Hashing of Strings in Python

    - by Chris S
    How would you convert an arbitrary string into a unique integer, which would be the same across Python sessions and platforms? For example hash('my string') wouldn't work because a different value is returned for each Python session and platform.

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  • What makes C faster than Python?

    - by Chris
    I know this is probably a very obvious answer and that I'm exposing myself to less-than-helpful snarky comments, but I don't know the answer so here goes. If Python compiles to bytecode at runtime, is it just that initial compiling step that takes longer? If that's the case wouldn't that just be a small upfront cost in the code (ie if the code is running over a long period of time, do the differences between C and python diminish?)

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  • MySQL-python 1.2.3 and OS X 10.5: 64- or 32-bit?

    - by Dave Everitt
    I've been happily using Django and MySQL in development on an existing machine running OS X 10.4 Tiger, and have set up a similar environment in 10.5 Leopard on a new 64-bit MacBook, with a working MySQL and Python 2.6.4. However, now I want them to communicate, easy_install MySQL-python gave ld warnings that the file is not of the required architecture, which led me to test my Python 2.4.6 install (from the Mac OS X disc image): >>> import sys >>> sys.maxint 2147483647 Ah. So my Python install appears to be 32-bit and (I think?) won't install MySQL-python for my 64-bit MySQL. There are lots of hacks out there for MySQL-python on OS X (mostly 1.2.2), but - after hours of reading - I'm pretty sure they won't fix this architecture mismatch. So I'm stuck because I can't decide whether to: give up, remove the 64-bit MySQL install (thorough methods, please?) and use the 32-bit MySQL disc image instead; re-install Python in 64-bit mode from the tarball, --with-universal archs-64-bit and --enable-universalsdk= as detailed in Python.org's 2.6 news. So my questions for anyone who has encountered this issue are: Is installing 64-bit Python on OS X 10.5 worth bothering with? If so, (naive, lazy question!) how are the two required arguments combined? If I just skip along in 32-bit (as on my working setup) what am I missing? I'm after a hassle-free install that's easy to reproduce on other machines (possible student use) so I'd really welcome your opinions, please!

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