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# Module: `core.magics.config`

Implementation of configuration-related magic functions.

## 1 Class

class `IPython.core.magics.config.``ConfigMagics`(shell)

  Bases: `IPython.core.magic.Magics`

  `__init__`(shell)
  `config`(s)

    configure IPython

    > %config Class[.trait=value]

    This magic exposes most of the IPython config system. Any Configurable class should be able to be configured with the simple line:

        %config Class.trait=value

    Where value will be resolved in the user’s namespace, if it is an expression or variable name.

    Examples

    To see what classes are available for config, pass no arguments:

        In [1]: %config
        Available objects for config:
            TerminalInteractiveShell
            HistoryManager
            PrefilterManager
            AliasManager
            IPCompleter
            PromptManager
            DisplayFormatter

    To view what is configurable on a given class, just pass the class name:

        In [2]: %config IPCompleter
        IPCompleter options
        -----------------
        IPCompleter.omit__names=<Enum>
            Current: 2
            Choices: (0, 1, 2)
            Instruct the completer to omit private method names
            Specifically, when completing on ``object.<tab>``.
            When 2 [default]: all names that start with '_' will be excluded.
            When 1: all 'magic' names (``__foo__``) will be excluded.
            When 0: nothing will be excluded.
        IPCompleter.merge_completions=<CBool>
            Current: True
            Whether to merge completion results into a single list
            If False, only the completion results from the first non-empty
            completer will be returned.
        IPCompleter.limit_to__all__=<CBool>
            Current: False
            Instruct the completer to use __all__ for the completion
            Specifically, when completing on ``object.<tab>``.
            When True: only those names in obj.__all__ will be included.
            When False [default]: the __all__ attribute is ignored
        IPCompleter.greedy=<CBool>
            Current: False
            Activate greedy completion
            This will enable completion on elements of lists, results of
            function calls, etc., but can be unsafe because the code is
            actually evaluated on TAB.

    but the real use is in setting values:

        In [3]: %config IPCompleter.greedy = True

    and these values are read from the user_ns if they are variables:

        In [4]: feeling_greedy=False

        In [5]: %config IPCompleter.greedy = feeling_greedy

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