Method autocall

IPython/core/magics/auto.py:64–128

Make functions callable without having to type parentheses. Usage: %autocall [mode] The mode can be one of: 0->Off, 1->Smart, 2->Full. If not given, the value is toggled on and off (remembering the previous state). In more detail, these values mean:

(self, parameter_s='')

    @skip_doctest
    @line_magic
    def autocall(self, parameter_s=''):
        """Make functions callable without having to type parentheses.

        Usage:

           %autocall [mode]

        The mode can be one of: 0->Off, 1->Smart, 2->Full.  If not given, the
        value is toggled on and off (remembering the previous state).

        In more detail, these values mean:

        0 -> fully disabled

        1 -> active, but do not apply if there are no arguments on the line.

        In this mode, you get::

          In [1]: callable
          Out[1]: <built-in function callable>

          In [2]: callable 'hello'
          ------> callable('hello')
          Out[2]: False

        2 -> Active always.  Even if no arguments are present, the callable
        object is called::

          In [2]: float
          ------> float()
          Out[2]: 0.0

        Note that even with autocall off, you can still use '/' at the start of
        a line to treat the first argument on the command line as a function
        and add parentheses to it::

          In [8]: /str 43
          ------> str(43)
          Out[8]: '43'

        # all-random (note for auto-testing)
        """

        if parameter_s:
            arg = int(parameter_s)
        else:
            arg = 'toggle'

        if not arg in (0, 1, 2, 'toggle'):
            error('Valid modes: (0->Off, 1->Smart, 2->Full')
            return

        if arg in (0, 1, 2):
            self.shell.autocall = arg
        else: # toggle
            if self.shell.autocall:
                self._magic_state.autocall_save = self.shell.autocall
                self.shell.autocall = 0