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This documentation is for an old version of IPython. You can find docs for newer versions here.
Decorators marks that a doctest should be skipped, for both python 2 and 3.
The IPython.testing.decorators module triggers various extra imports, including numpy and sympy if they’re present. Since this decorator is used in core parts of IPython, it’s in a separate module so that running IPython doesn’t trigger those imports.
Decorator - mark a function or method for skipping its doctest.
This decorator allows you to mark a function whose docstring you wish to omit from testing, while preserving the docstring for introspection, help, etc.
Decorator - skip the doctest under Python 3.