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Python Code blocks, execution frames, and namespaces

From WikiOD

A code block is a piece of Python program text that can be executed as a unit, such as a module, a class definition or a function body. Some code blocks (like modules) are normally executed only once, others (like function bodies) may be executed many times. Code blocks may textually contain other code blocks. Code blocks may invoke other code blocks (that may or may not be textually contained in them) as part of their execution, e.g., by invoking (calling) a function.

Code block namespaces[edit | edit source]

Code Block Type Global Namespace Local Namespace
Module n.s. for the module same as global
Script (file or command) n.s. for __main__ same as global
Interactive command n.s. for __main__ same as global
Class definition global n.s. of containing block new namespace
Function body global n.s. of containing block new namespace
String passed to exec statement global n.s. of containing block local namespace of containing block
String passed to eval() global n.s. of caller local n.s. of caller
File read by execfile() global n.s. of caller local n.s. of caller
Expression read by input() global n.s. of caller local n.s. of caller

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