Method alias

IPython/core/magics/osm.py:98–182

Define an alias for a system command. '%alias alias_name cmd' defines 'alias_name' as an alias for 'cmd' Then, typing 'alias_name params' will execute the system command 'cmd params' (from your underlying operating system). Aliases have lower precedence than magic

(self, parameter_s='')

    @skip_doctest
    @line_magic
    def alias(self, parameter_s=''):
        """Define an alias for a system command.

        '%alias alias_name cmd' defines 'alias_name' as an alias for 'cmd'

        Then, typing 'alias_name params' will execute the system command 'cmd
        params' (from your underlying operating system).

        Aliases have lower precedence than magic functions and Python normal
        variables, so if 'foo' is both a Python variable and an alias, the
        alias can not be executed until 'del foo' removes the Python variable.

        You can use the %l specifier in an alias definition to represent the
        whole line when the alias is called.  For example::

          In [2]: alias bracket echo "Input in brackets: <%l>"
          In [3]: bracket hello world
          Input in brackets: <hello world>

        You can also define aliases with parameters using %s specifiers (one
        per parameter)::

          In [1]: alias parts echo first %s second %s
          In [2]: %parts A B
          first A second B
          In [3]: %parts A
          Incorrect number of arguments: 2 expected.
          parts is an alias to: 'echo first %s second %s'

        Note that %l and %s are mutually exclusive.  You can only use one or
        the other in your aliases.

        Aliases expand Python variables just like system calls using ! or !!
        do: all expressions prefixed with '$' get expanded.  For details of
        the semantic rules, see PEP-215:
        http://www.python.org/peps/pep-0215.html.  This is the library used by
        IPython for variable expansion.  If you want to access a true shell
        variable, an extra $ is necessary to prevent its expansion by
        IPython::

          In [6]: alias show echo
          In [7]: PATH='A Python string'
          In [8]: show $PATH
          A Python string
          In [9]: show $$PATH
          /usr/local/lf9560/bin:/usr/local/intel/compiler70/ia32/bin:...

        You can use the alias facility to access all of $PATH.  See the %rehashx
        function, which automatically creates aliases for the contents of your
        $PATH.

        If called with no parameters, %alias prints the current alias table
        for your system.  For posix systems, the default aliases are 'cat',
        'cp', 'mv', 'rm', 'rmdir', and 'mkdir', and other platform-specific
        aliases are added.  For windows-based systems, the default aliases are
        'copy', 'ddir', 'echo', 'ls', 'ldir', 'mkdir', 'ren', and 'rmdir'.

        You can see the definition of alias by adding a question mark in the