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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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  • 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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  • 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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  • Catching and outputting stderr at the same time with python's subprocess

    - by Mediocre Gopher
    (Using python 3.2 currently) I need to be able to: Run a command using subprocess Both stdout/stderr of that command need be printed to the terminal in real-time (it doesn't matter if they both come out on stdout or stderr or whatever At the same time, I need a way to know if the command printed anything to stderr (and preferably what it printed). I've played around with subprocess pipes as well as doing strange pipe redirects in bash, as well as using tee, but as of yet haven't found anything that would work. Is this something that's possible?

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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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  • 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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  • 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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  • 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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  • 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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  • 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 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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  • 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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  • 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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  • installing opencv for python issues

    - by vlad
    I'm running OS X Leopard. I followed this site to install it. Trying to run any demo script, I now get "No module named opencv.cv", which is obviously stopping me from doing any programming. I am running python 2.5.1 (yes, I know it's kind of old). Why would this be, and how can I solve it? Thanks

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  • Sanitising user input using Python

    - by Steve
    What's the best way to sanitise user input for a Python-based web application? Is there a single function to remove HTML characters and any other necessary characters combinations to ensure that an XSS or SQL injection attack isn't possible?

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