Namespaces and Scopes

A namespace is a mapping from names to objects.

Namespaces are usually implemented in Python as dictionaries.

A scope is a textual region of a Python program where a namespace is directly accessible.

Scopes in Python:

• the innermost scope contains the local names
• the scope of an enclosing function
• the next-to-last scope contains the current module's global names
• the outermost scope is the namespace containing built-in names

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