Fail during installation of Pillow (Python module) in Linux
I’m trying to install Pillow (Python module) using pip, but it throws this error:
python
How do I print functions as they are called?
In debugging a Python script, I’d really like to know the entire call stack for my entire program. An ideal situation would be if there were a command-line flag for python that would cause Python to print all function names as they are called (I checked man Python2.7, but didn’t find anything of this sort).
Parallelizing a Numpy vector operation
Let’s use, for example, numpy.sin()
Simple URL GET/POST function in Python
I can’t seem to Google it, but I want a function that does this:
How can I listen for ‘usb device inserted’ events in Linux, in Python?
I’d like to write a Python script for Amarok in Linux to automatically copy the stackoverflow podcast to my player. When I plug in the player, it would mount the drive, copy any pending podcasts, and eject the player. How can I listen for the “plugged in” event? I have looked through hald but couldn’t find a good example.
How to read a .xlsx file using the pandas Library in iPython?
I want to read a .xlsx file using the Pandas Library of python and port the data to a postgreSQL table.
When do I need to use sqlalchemy back_populates?
When I try SQLAlchemy Relation Example following this guide: Basic Relationship Patterns
Python constructor and default value
Somehow, in the Node class below, the wordList and adjacencyList variable is shared between all instances of Node. >>> class Node: … def __init__(self, wordList = [], adjacencyList = []): … self.wordList = wordList … self.adjacencyList = adjacencyList … >>> a = Node() >>> b = Node() >>> a.wordList.append("hahaha") >>> b.wordList ['hahaha'] >>> b.adjacencyList.append("hoho") >>> … Read more
Prevent creating new attributes outside __init__
I want to be able to create a class (in Python) that once initialized with __init__, does not accept new attributes, but accepts modifications of existing attributes. There’s several hack-ish ways I can see to do this, for example having a __setattr__ method such as
How to normalize a 2-dimensional numpy array in python less verbose?
Given a 3 times 3 numpy array