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• Python tkInter text entry validation

  - by meade

  I'm trying to validate the entry of text using Python/tkInter def validate_text(): return False text = Entry(textframe, validate="focusout", validatecommand=validate_text) where validate_text is the function - I've tried always returning False and always returning True and there's no difference in the outcome..? Is there a set of arguments in the function that I need to include? Edit - changed from NONE to focusout...still not working

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• Change array that might contain None to an array that contains "" in python

  - by vy32

  I have a python function that gets an array called row. Typically row contains things like: ["Hello","goodbye","green"] And I print it with: print "\t".join(row) Unfortunately, sometimes it contains: ["Hello",None,"green"] Which generates this error: TypeError: sequence item 2: expected string or Unicode, NoneType found Is there an easy way to replace any None elements with ""?

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• Python - Launch a Long Running Process from a Web App

  - by Greg

  I have a python web application that needs to launch a long running process. The catch is I don't want it to wait around for the process to finish. Just launch and finish. I'm running on windows XP, and the web app is running under IIS (if that matters). So far I tried popen but that didn't seem to work.

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• Why does socket.inet_ntoa returns packed format in python

  - by sleepy

  Why does socket.inet_aton returns packed format in python? If I am storing the IP as integer in Database (mysql), do I have to always extract the integer value or is there any easier way out?

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• What's the logical value of "string" in python?

  - by Kamran

  I erroneously wrote this code in python: name = input("what is your name?") if name == "Kamran" or "Samaneh": print("That is a nice name") else: print("You have a boring name ;)") It always prints out "That is a nice name" even when the input is neither "Kamran" nor "Samaneh". Am I correct in saying that it considers "Samaneh" as a true? why? By the way, I already noticed my mistake. The correct form is: if name == "Kamran" or name == "Samaneh":

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• Run a python process in a separate thread

  - by Bialecki

  I'm looking for a quick bash script or program that will allow me to kick off a python script in a separate thread. What's the best way to do this? I know this is incredibly simple, just curious if there's a preferred way to do it.

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• Lisp's "some" in Python?

  - by Mark Probst

  I have a list of strings and a list of filters (which are also strings, to be interpreted as regular expressions). I want a list of all the elements in my string list that are accepted by at least one of the filters. Ideally, I'd write [s for s in strings if some (lambda f: re.match (f, s), filters)] where some is defined as def some (pred, list): for x in list: res = pred (x) if res: return res return False Is something like that already available in Python, or is there a more idiomatic way to do this?

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• symbols in command line argument.. python, bash

  - by Idlecool

  Hi, I am writing a python script on Linux for twitter post using API, Is it possible to pass symbols like "(" ")" etc in clear text without apostrophes.... % ./twitterupdate this is me #works fine % ./twitterupdate this is bad :(( #this leaves a error on bash. Is the only alternative is to enclose the text into -- "" ?? like.. % ./twitterupdate "this is bad :((" #this will reduce the ease of use for the script Is there any workaround?

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• Problem with list slice syntax in python

  - by Dingle

  The extended indexing syntax is mentioned in python's doc. slice([start], stop[, step]) Slice objects are also generated when extended indexing syntax is used. For example: a[start:stop:step] or a[start:stop, i]. See itertools.islice() for an alternate version that returns an iterator. a[start:stop:step] works as described. But what about the second one? How is it used?

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• Start app from within python

  - by Aaron Hoffman

  Hello, I'm trying to start an application using Python. I've seen that some people use startfile but I also read that it only works with Windows. I'm using Mac systems and hoping for it to work with them. Thanks, Aaron

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• Can someone explain __all__ in Python?

  - by varikin

  I have been using Python more and more, and I keep seeing the variable __all__ set in different __init__.py files. Can someone explain what this does?

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• Web application performance: PHP or Python?

  - by Michael

  Which technology is better to use in terms of performance for high performance scalable web application? PHP or Python? The project is going to involve database.

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• Executing JavaScript with Python without X.

  - by Thomas

  I want to parse a html-page that unfortunately requires JavaScript to show any content. In order to do so I use a small python-script that pulls the html-code of the page, but after that I have to execute the JavaScript in a DOM-context which seems pretty hard. To make it even harder I want to use it in a server environment that has no X11-server. Note: I already read about http://code.google.com/p/pywebkitgtk/ but it seems to need a X-server.

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• Proper indentation for Python multiline strings

  - by ensnare

  What is the proper indentation for Python multiline strings within a function? def method: string = """line one line two line three""" or def method: string = """line one line two line three""" or something else? It looks kind of weird to have the string hanging outside the function in the first example. Thanks.

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• Automatically Generate a FlowChart in Python

  - by fayce

  Dear All, I would like to automatically generate a flowchart similar to this one ( http://en.wikipedia.org/wiki/File:%281%29_2008-04-07_Information_Management-_Help_Desk.jpg ) with Python. Do you have any advice regarding the library I should use to draw boxes, arrows (with the shortest path), text and some colors. Many thanks in advance !

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• Print one word from a string in python

  - by Shai

  Hi, How can i print only certain words from a string in python ? lets say i want to print only the 3rd word (which is a number) and the 10th one while the text length may be different each time mystring = "You have 15 new messages and the size is 32000" thanks.

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• python django automated data addition

  - by zubin71

  I have a script which reads data from a csv file. I need to store the data into a database which has already been created as $ python manage.py syncdb so, that automated data entry is possible in an easier manner, as available in the django shell.

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• how to get internet explorer address bar for python

  - by john misoskian

  hi; i need grab to internet explorer address bar. how to get address bar url for python ? (i need second part other browsers grabbing address bar but internet explorer is urgently). Thanks.

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• Run python in a separate process

  - by Bialecki

  I'm looking for a quick bash script or program that will allow me to kick off a python script in a separate process. What's the best way to do this? I know this is incredibly simple, just curious if there's a preferred way to do it.

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• python command line yes/no input

  - by h3

  Is there any short way to achieve what APT does in Python ? I mean, when the package manager prompts a yes/no question followed by "[Yes/no]". The scripts accepts YES/Y/yes/y or "enter" (defaults to Yes as hinted by the capital) The only thing I find in the official doc is input/raw_input.. I know it's not that hard to emulate, but it's annoying to rewrite :|

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• POST request from Python to PHP

  - by RainbowHat

  Python params = urllib.parse.urlencode({'spam': '1', 'eggs': '2', 'bacon': '3'}) binary_data = params.encode('utf-8') reg = urllib.request.Request("http://www.abc.com/abc/smart/ap/request/",binary_data) reg.add_header('Content-Type','application/x-www-form-urlencoded') f = urllib.request.urlopen(reg) print(f.read()) PHP if($_SERVER['REQUEST_METHOD'] == 'POST') { //parse_str($_SERVER['QUERY_STRING']); var_dump($_SERVER['QUERY_STRING']); } When i try print binary_data , it does show the parameter but by the time it reaches the PHP , i see nothing. Any idea?

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• How to generate all strings with d-mismatches, python

  - by mr.M

  I have a following string - "AACCGGTTT" (alphabet is ["A","G","C","T"]). I would like to generate all strings that differ from the original in any two positions i.e. GAGCGGTTT ^ ^ TATCGGTTT ^ ^ How can I do it in Python? I have only brute force solution (it is working): generate all strings on a given alphabet with the same length append strings that have 2 mismatches with a given string However, could you suggest more efficient way to do so?

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• python - remove string from words in an array

  - by tekknolagi

  #!/usr/bin/python #this looks for words in dictionary that begin with 'in' and the suffix is a real word wordlist = [line.strip() for line in open('/usr/share/dict/words')] newlist = [] for word in wordlist: if word.startswith("in"): newlist.append(word) for word in newlist: word = word.split('in') print newlist how would I get the program to remove the string "in" from all the words that it starts with? right now it does not work

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• Abstract attributes in Python

  - by deamon

  What is the shortest / most elegant way to implement the following Scala code with an abstract attribute in Python? abstract class Controller { val path: String } A subclass of Controller is enforced to define "path" by the Scala compiler. A subclass would look like this: class MyController extends Controller { override val path = "/home" }

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• Are C style macros available in Python?

  - by Dragos Toader

  In C there's a way to #define macros: #define OBJWITHSIZE(_x) (sizeof _x)/(sizeof _x[0]) Is there a way to do this in Python?

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