Python Articles on Variable Scope

Python has 4 scopes: local, enclosing, global, and built-ins. Python's "global" variables are only global to the module they're in. The only truly universal variables are the built-ins.

Local and global variables in Python
3 mins
Assigning to global variables
3 mins
Scope is about assignment, not mutation
2 mins
Each module has its own global scope
2 mins
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