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Python 3: UnboundLocalError: local variable referenced before assignment [duplicate]
...ng variable, but for reasons unknown (likely consistency in this context), Python treats it as an assignment). The Python interpreter sees this at module load time and decides (correctly so) that the global scope's Var1 should not be used inside the local scope, which leads to a problem when you try...
What are metaclasses in Python?
In Python, what are metaclasses and what do we use them for?
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What is the difference between old style and new style classes in Python?
What is the difference between old style and new style classes in Python? When should I use one or the other?
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pypi UserWarning: Unknown distribution option: 'install_requires'
Does anybody encounter this warning when executing python setup.py install of a PyPI package?
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What does -> mean in Python function definitions?
I've recently noticed something interesting when looking at Python 3.3 grammar specification :
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How to turn on line numbers in IDLE?
...wise there are a bunch of other IDEs some of which are free: https://wiki.python.org/moin/IntegratedDevelopmentEnvironments
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Installing specific package versions with pip
I'm trying to install version 1.2.2 of the MySQL_python adaptor, using a fresh virtualenv created with the --no-site-packages option. The current version shown in PyPi is 1.2.3 . Is there a way to install the older version? I found an article stating that this should do it:
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Image library for Python 3
What is python-3 using instead of PIL for manipulating Images?
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Validating with an XML schema in Python
...e to validate that my XML file adheres to the schema. How do I do this in Python?
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Use 'import module' or 'from module import'?
...est to use import module or from module import . I've just started with Python and I'm trying to start off with best practices in mind.
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