[How to] Python IDLE tab completion

1. Put the codes into a file named '.pythonstartup'.

import pdb

# python startup file
import readline
import rlcompleter
import atexit
import os

# tab completion
readline.parse_and_bind('tab: complete')

# history file
histfile = os.path.join(os.environ['HOME'], '.pythonhistory')

try:
    readline.read_history_file(histfile)
except IOError:
    pass

atexit.register(readline.write_history_file, histfile)
del os, histfile, readline, rlcompleter

2. Put the file into your HOME directory.
Linux/Mac : ~/.pythonstartup Windows : C:\Users\USERNAME\.pythonstartup
PS: In MacOsX probably you will need to install readline

sudo easy_install readline 

3. Set the Environment Variables.

In Windows : Just do it like this.

In Linux/Mac : Put the line into the file named '.profile'.

 export PYTHONSTARTUP=~/.pythonstartup 

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