In Python Shell, I entered: aList = ['a', 'b', 'c', 'd'] for i in aList: print(i) and got a b c d but when I tried: aList = ['a', 'b', 'c', 'd'] aList = aList.append('e') for i in aList: print(i) and got Traceback (most recent call last): File "<pyshell#22>", line 1, in <module> for ...
Hello, There is a function to capitalize a string, I would like to be able to change the first character of a string to be sure it will be lowercase. How can I do that in Python ? ...
My problem is the following: I would like to open an instance of ipython in a terminal of mine by simply typing, as usual: $ ipython -pylab and be able to have other processes order this ipython instance to execute a file as the execfile() would. This could be any other process, for instance, vim could ask ipython to run the currently...
I have been trying to optimize the two following nested loops: def startbars(query_name, commodity_name): global h_list nc, s, h_list = [], {}, {} query = """ SELECT wbcode, Year, """+query_name+""" FROM innovotable WHERE commodity='"""+commodity_name+"""' and """+query_name+""" != 'NU...
The error returned is: exception: manual matcher config not allowed Here's my code: cond = {'id': id, 'date': {'$gte': start_date}, 'date': {'$lte': end_date}, 'location': {'$within': {'$box': box }}} reduce = 'function(obj, prev) { prev.count++; }' rows = collection.group({'location': True}, cond, {'count': 0}, reduce) When I remove...
is there a way to use %def references somehow, basic idea being: % if condition_a: % func = %def_a % elif condition_b: % func = %def_b ... etc ... ${func( params )} ...
If you are familiar with a specific python web framework that has implementations for HTML5 API(s) ie.WebSockets, Forms, WebWorkers, WebStorage, Communication, Geolocation, Canvas, etc. Then please list the name of the framework and its HTML5 capabilities. ...
It doesn't look like it has that attribute, but it'd be really useful to me. ...
Hi all, This particular problem is easy to solve, but I'm not so sure that the solution I'd arrive at would be computationally efficient. So I'm asking the experts! What would be the best way to go through a large file, collecting stats (for the entire file) on how often two words occur in the same line? For instance, if the text cont...
I have a script that uses Tkinter to pop up a window with a message. How do I make sure it takes focus so the user doesn't miss it and explicitly has to dismis the window. the code is : root = Tk() to_read = "Stuff" w = Label(root, text=to_read) w.pack() root.mainloop() Thanks. ...
Whats a simple code that does parallel processing in python 2.7? All the examples Ive found online are convoluted and include unnecessary codes. how would i do a simple brute force integer factoring program where I can factor 1 integer on each core (4)? my real program probably only needs 2 cores, and need to share information. I know ...
As I have stated in this question some time ago, I am having performance problems when accessing an sqlite database from Python. To make that clear once more, the identical code runs more than 20 times faster using apsw. I recently installed a different version of Python in parallel and installed a new version of apsw for that. This vers...
Suppose a function f() returns a value of arbitrary type, perhaps an object but possibly even a builtin type like int or list. Is there a way to assign a variable to that return value, and have a function of my choosing be called the first time the variable is used? I suppose this is similar to lazy evaluation except that a reference to...
Hello all, Here's the issue: I have a thread which runs a for-loop reading from a generator, doing some processing on that data, etc.. The generator always has data coming in, so no StopIteration exception is ever raised by it. I would like to stop this thread (cleanly) from the main thread (i.e., exit out of the for-loop which is pro...
I want to set up a lookup function with mako. on top of the template, i have <%! lookup = { 'key': function } %> <%def name="function()"> Output </%def> so i can use it later <%def name="body()"> ${lookup['key']()} </%def> this gives me a function is not a defined error. can i get around this? i know why it doesn'...
Having an UTF-8 string like this: mystring = "işğüı" is it possible to get its (in memory) size in Bytes with Python (2.5)? ...
With this code, the window is 500 by 500, which is what I'm going for: from tkinter import * root = Tk() frame = Frame(root, width=500, height=500) frame.pack() root.mainloop() When I add a text box to the frame, though, it shrinks to just the size of the text box: from tkinter import * root = Tk() frame = Frame(root, width=500, h...
I am developing an application that uses multiple threads to gather data from a variety of network devices. I'm using PyQT to display the collected data on a GUI. I am using regular python threads (from thread, threading) in my app (instead of QThread). In order to update the GUI on the different threads, I use a lock (thread.allocate_l...
I've set up a gtk.TreeView with a gtk.TreeStore. One column contains formatted dollar amounts, and I've set up sorting by that column as follows: def sortmon(model, i1, i2): v1 = model[i1][COL_MONEY] v2 = model[i2][COL_MONEY] return cmp(float(v1.replace("$","").replace(",","")), float(v2.re...
I like the Java convention of having one public class per file, even if there are sometimes good reasons to put more than one public class into a single file. In my case I have alternative implementations of the same interface. But if I would place them into separate files, I'd have redundant names in the import statements (or misleading...