I'm still fairly new to Python and I'm trying to get used to its dynamic typing. Sometimes I have a function or a class that expects a parameter of a certain type, but could get a value of another type that's coercible to it. For example, it might expect a float but instead receive an int or a decimal. Or it might expect a string, but in...
Hi friends, Does the presence of python GIL imply that in python multi threading the same operation is not so different from repeating it in a single thread?. For example, If I need to upload two files, what is the advantage of doing them in two threads instead of uploading them one after another?. I tried a big math operation in bot...
Suppose I have a program A. I run it, and performs some operation starting from a file foo.txt. Now A terminates. New run of A. It checks if the file foo.txt has changed. If the file has changed, A runs its operation again, otherwise, it quits. Does a library function/external library for this exists ? Of course it can be implemente...
I'm going to create statistics based on information what builds were success or not and how much per project. I create ProjectStat class per new project I see and inside handled statistics. For printing overall statistic I need to pass through all ProjectStat instances. For printing success statistics per project I need to pass through...
Hey all, I took a scientific programming course this semester that I really enjoyed and experimented with a lot. We used python, and all the related modules. I am taking a physics lab next semester and I just wanted to hear from some of you how python can help me in ways that excel can't or in ways that are better than excel's capabili...
Hi, I want to escape '"' and all other wild chars in program name and arguments, so I try to double quote them. and I can do this in cmd.exe C:\bay\test\go>"test.py" "a" "b" "c" hello ['C:\\bay\\test\\go\\test.py', 'a', 'b', 'c'] but what's wrong with the following code using os.sytem? cmd = '"test.py" "a" "b" "c"' print cmd os.syst...
Hello everybody!!! I am trying to pass automatically, using Google App Engine, my password and ID to eBay, to this page: https://signin.ebay.com/ws/eBayISAPI.dll?SignIn&UsingSSL=1&pUserId=&co_partnerId=2&siteid=0&ru=http%3A%2F%2Fcgi5.ebay.com%2Fws2%2FeBayISAPI.dll%3FSellItem%26hm%3Dum.rundkoi376%26%26hc%3D1%26guest...
Hello folks: I am learning IronPython along wiht Python. I'm curious what kinds of tasks you tend to use IronPython to tackle more often than standard .NET languages. Thanks for any example. ...
from xml.dom.minidom import * resp = "<title> This is a test! </title>" rssDoc = parseString(resp) titles = rssDoc.getElementsByTagName('title') moo = "" for t in titles: moo += t.nodeValue; Gives the following error: main.py, line 42, in get moo += t.nodeValue; TypeError: cannot concatenate 'str' and 'NoneType' object...
(New to Python and GAE) I'm looking for an explanation to the use of class variables in db.Model subclasses, which are treated like instance variables. Why are these declared in class scope and not in __init__? Is this some kind of special GAE requirement? ...
How to display the following without any space also could we substitute a separator instead of space? > log_time=datetime.datetime.now() > print log_time 2009-12-16 16:10:03.558991 ...
I am constantly trying to optimize my time. Writing a C code takes a lot of time and requires much more keyboard touches than say writing a Python program. However, in order to speed up the time required to create a C program, one can automatize many things. I'd like to write my programs using smth. like Python but with C semantics. I...
How to open a webpage and search for a word in python? ...
I'd like to delete an instance of a model, but only if it doesn't have any other instance of another class with a foreign key pointing to it. From Django documentation: When Django deletes an object, it emulates the behavior of the SQL constraint ON DELETE CASCADE -- in other words, any objects which had foreign keys pointing at the ...
I'm in the process of tuning a pet project of mine to improve its performance. I've already busted out the profiler to identify hotspots but I'm thinking understanding Pythons performance characteristics a little better would be quite useful going forward. There are a few things I'd like to know: How smart is its optimizer? Some moder...
I can do basic regex alright, but this is slightly different, namely I don't know what the pattern is going to be. For example, I have a list of similar strings: lst = ['asometxt0moretxt', 'bsometxt1moretxt', 'aasometxt10moretxt', 'zzsometxt999moretxt'] In this case the common pattern is two segments of common text: 'sometxt' and 'mo...
I'm trying to use TOR as a generic proxy but it fails Right now I'm trying with python but I'm pretty sure it would be the same with any other language. I can connect to other proxies with python so I get how it "should" be done. I found a list of TOR entry nodes h = httplib.HTTPConnection("one entry node", 80) h.connect() h.request("...
Hello all, I've been trying to pickle an object which contains references to static class methods. Pickle fails (for example on module.MyClass.foo) stating it cannot be pickled, as module.foo does not exist. I have come up with the following solution, using a wrapper object to locate the function upon invocation, saving the container cla...
I'm new to Python and seems that the multiprocessing and threads module are not very interesting and suffer from the same problems such as threads in Perl. Is there a technical reason why the interpreter can't use lightweight threads such as posix threads to make an efficient thread implementation that really runs on several cores? ...
I just saw this section of Unladen Swallow's documentation come up on Hacker News. Basically, it's the Google engineers saying that they're not optimistic about removing the GIL. However, it seems as though there is discussion about the garbage collector interspersed with this talk about the GIL. Could someone explain the relation to ...