shell.py

Simple wrapper around Python's Popen.

Usage

>>> sh = Shell()
>>> sh(command, *args, **kwargs)    # <command> <kwargs> <args>
>>> sh.command(*args, **kwargs)     # <command> <kwargs> <args>

Examples

>>> sh = Shell()
>>> sh.ls('*.txt')                  # ls *.txt
>>> sh.uname("-a")                  # uname -a
>>> sh.uname(_a=None)               # uname -a
>>> sh.ping('127.0.0.1', _c=1)      # ping -c 1 127.0.0.1
>>> sh.cut(_d='"\t"', _f=2)         # cut -d "\t" -f 2
>>> sh.cut(**{'-d':'"\t"', '-f':2}) # cut -d "\t" -f 2
>>> sh("ps -x")                     # ps -x

Modes

Shell(Shell.POPEN) (default)

Returns a Popen object for the command.

Shell(Shell.OUTPUT)

Returns the output of the command.

Shell(Shell.BOOL)

Returns True if the return code of the command is 0, else False.

Parsing

• Arguments

  Appended to command line without modification after the keyword arguments.

• Keyword arguments

  If the key starts with an underscore, all the underscores in the key gets replaced with a hypen.

  If the value coerces to True, it gets appended to the command line after the key.

        _f=None  ->  "-f"
    __foo="bar"  ->  "--foo bar"
__foo_bar="baz"  ->  "--foo-bar baz"
  foo_bar="baz"  ->  "foo_bar baz"