Question or problem about Python programming: I would like to shift a column in a Pandas DataFrame, but I haven’t been able to find a method to do it from the documentation without rewriting the whole DF. Does anyone know how to do it? DataFrame:
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Question or problem about Python programming: In Python specifically, how do variables get shared between threads?
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Question or problem about Python programming: I have an array of floats (some normal numbers, some nans) that is coming out of an apply on a pandas dataframe.
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Question or problem about Python programming: Is there a built-in way to use read_csv to read only the first n lines of a file without knowing the length of the lines ahead of time? I have a large file that takes a long time to read, and occasionally only want to use the first, say, […]
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Question or problem about Python programming: I’m trying to understand the following piece of code: # node list n = [] for i in xrange(1, numnodes + 1): tmp = session.newobject(); n.append(tmp) link(n[0], n[-1]) Specifically, I don’t understand what the index -1 refers to. If the index 0 refers to the first element, then what […]
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Question or problem about Python programming: I found this project: http://code.google.com/p/standalonewebsocketserver/ for a WebSocket server, but I need to implement a WebSocket client in python, more exactly I need to receive some commands from XMPP in my WebSocket server. How to solve the problem: Solution 1: http://pypi.python.org/pypi/websocket-client/ Ridiculously easy to use. sudo pip install websocket-client […]
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Question or problem about Python programming: I want to use the Django template engine in my (Python) code, but I’m not building a Django-based web site. How do I use it without having a settings.py file (and others) and having to set the DJANGO_SETTINGS_MODULE environment variable?
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Question or problem about Python programming: Suppose I have a string which is a backslash-escaped version of another string. Is there an easy way, in Python, to unescape the string? I could, for example, do:
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Question or problem about Python programming: How do I print the memory address of a variable in Python 2.7? I know id() returns the ‘id’ of a variable or object, but this doesn’t return the expected 0x3357e182 style I was expecting to see for a memory address. I want to do something like print &x, […]
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Question or problem about Python programming: I use Django but I need to find the default templates and applications.
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