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Glossary: decorator

A function returning another function, usually applied as a function transformation using the @wrapper syntax. Common examples for decorators are classmethod() and staticmethod().

The decorator syntax is merely syntactic sugar, the following two function definitions are semantically equivalent:

def f(arg):
    ...
f = staticmethod(f)

@staticmethod
def f(arg):
    ...

The same concept exists for classes, but is less commonly used there. See the documentation for function definitions and class definitions for more about decorators.

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• Glossary

  decorator

• contextlib — Utilities for with-statement contexts
• enum — Support for enumerations

  ...s without conflicting with member names. The value and name attributes are implemented this way. unique() Enum class decorator that ensures only one name is bound to any one value. verify() Enum class decorator that checks user-selecta...

• typing — Support for type hints
• unittest.mock — getting started
• unittest.mock — mock object library
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