urllib.urlretrieve returns silently even if the file doesn't exist on the remote http server, it just saves a html page to the named file. For example: urllib.urlretrieve('http://google.com/abc.jpg', 'abc.jpg') just returns silently, even if abc.jpg doesn't exist on google.com server, the generated abc.jpg is not a valid jpg file, it'...
let's say I have a list a = [1,2,3] I'd like to increment every item of that list in place. I want to do something as syntactically easy as for item in a: item += 1 but in that example python uses just the value of item, not its actual reference, so when I'm finished with that loop a still returns [1,2,3] instead of [2,3,4]. ...
How can i convert the following: s = "{'muffin' : 'lolz', 'foo' : 'kitty'}" Into a dictionary object? I'd prefer not to use eval() what should i do? The main reason for this, is one of my coworkers classes he wrote, converts all input into strings. I'm not in the mood to go and modify his classes, to deal with this issue. ...
I am kind of hitting a wall on this problem and I was wondering if some fresh brains could help me out. I have a large list of four element tuples in the format: (ID number, Type, Start Index, End Index) Previously in the code, I have searched through thousands of blocks of text for two specific types of substrings. These tuples stor...
I want to find a certain substring inside a string. The string is stored in a list of strings. How can i do it? ...
Why does Python's os module contain error, an alias for OSError? Is there a reason to ever spell it os.error? OSError certainly seems more consistent with all the other built-in exceptions. I hoped os.py would shed some light, but it uses error sometimes and OSError others. It seems goofy to have an extra name for one of the exception...
my input is something like this 23 + 45 = astart for the exact input when i take it as raw_input() and then try to split it , it gives me an error like this SyntaxError: invalid syntax the code is this k=raw_input() a,b=(str(i) for i in k.split(' + ')) b,c=(str(i) for i in b.split(' = ')) its always number + number = asta...
Is there an elegant and pythonic way to trap the first and last item in a for loop which is iterating over a generator? from calendar import Calendar cal = Calendar(6) month_dates = cal.itermonthdates(year, month) for date in month_dates: if (is first item): # this is fake month_start = date if (is last item): ...
I want to write a program that changes the HTTP headers in my requests that are sent by my web-browser. I believe it can be done with a proxy server. So, I'd like to write a proxy server. I study programming. How can I do this in Python? ...
It should be simple, bit I've spent the last hour searching for the answer. This is using psychopg2 on python 2.6. I need something like this: special_id = 5 sql = """ select count(*) as ct, from some_table tbl where tbl.id = %(the_id) """ cursor = connection.cursor() cursor.execute(sql, ...
I'm new to Python and am playing around with making a very basic web crawler. For instance, I have made a simple function to load a page that shows the high scores for an online game. So I am able to get the source code of the html page, but I need to draw specific numbers from that page. For instance, the webpage looks like this: http:...
I'd like to find out the arity of a method in Python (the number of parameters that it receives). Right now I'm doing this: def arity(obj, method): return getattr(obj.__class__, method).func_code.co_argcount - 1 # remove self class Foo: def bar(self, bla): pass arity(Foo(), "bar") # => 1 I'd like to be able to achieve this...
So I just finished watching this talk on the Python Global Interpreter Lock (GIL) http://blip.tv/file/2232410. The gist of it is that the GIL is a pretty good design for single core systems (Python essentially leaves the thread handling/scheduling up to the operating system). But that this can seriously backfire on multi-core systems an...
When I tried to get the content of a tag using "unicode(head.contents[3])" i get the output similar to this: "Christensen Sk\xf6ld". I want the escape sequence to be returned as string. How to do it in python? ...
Possible Duplicate: To learn python 2 then 3, or 3 from the start? I started learning python in 2.6 but didn't get as far as I would have liked before getting overloaded with projects at work. Now, I'd like to start fresh again, but should I go back to 2.6 or 3 now that it's been out for a little while. I searched and found th...
What I'm trying to do would look like this in the command line: >>> import mymodule >>> names = dir(mymodule) How can I get a reference to all the names defined in mymodule from within mymodule itself? Something like this: # mymodule.py names = dir(__thismodule__) ...
I have a django application hosted on webfaction which now has a static/private ip. Our network in the office is obviously behind a firewall and the AD server is running behind this firewall. From inside the network i can authenticate using python-ldap with the AD's internal IP address and the port 389 and all works well. When i move t...
i want to create a matrix of size 1234*5678 with it being filled with 1 to 5678 in row major order?>..!! ...
I recently faced a problem about combining unit tests and doctests in Python. I worked around this problem in other way, but I still have question about it. Python's doctest module parses docstrings in a module and run commands following ">>> " at the beginning of each line and compare the output of it and those in docstrings. I wonder...
(Edited to note: exact duplicate of 989739) Could you give any suggestions or online sourses as to the matter of writing one's own client proxy-server? In particular, this proxy must be able to make one thing: replace the HTTP-headers sent by browsers with my own ones. ...