Pythonrc with Shortcuts for ls, ll, cd, and quit

.pythonrc.py

"""Some common helper functions to put in your ~/.pythonrc to make the python REPL behave more like a real shell."""

import os

def cd(folder):
    """e.g. cd('/bin')"""
    os.chdir(folder)

def quit():
    raise SystemExit(0)

def listdir(dir=None):
    return os.listdir(dir or os.getcwd())

class InstantShortcut:
    """run a command instantly on __repr__, also supports adding parens to call it with args"""
    
    def __init__(self, command, delimiter='\n'):
        self.__call__ = command
        self.delimiter = delimiter

    def __repr__(self):
        return self.delimiter.join(self())

quit = q = InstantShortcut(quit)
ls = InstantShortcut(listdir, '    ')
ll = InstantShortcut(listdir, '\n')
# usage: type `ll` and press enter in a REPL to list the current directory on seperate lines
# type just `quit` and press enter to quit python instead of having to type quit()