IPython/rlineimpl.py

# -*- coding: utf-8 -*-
""" Imports and provides the "correct" version of readline for the platform.

Readline is used throughout IPython as "import IPython.rlineimpl as readline.

In addition to normal readline stuff, this module provides have_readline boolean 
and _outputfile variable used in genutils.

$Id: Magic.py 1096 2006-01-28 20:08:02Z vivainio $"""


import sys

have_readline = False

if sys.platform == 'win32':
    try:
        from pyreadline import *
        print "Using the new pyreadline (thanks for participating in the testing!)"
        have_readline = True
    except ImportError:
        print "The IPython team recommends the new pyreadline for Windows use, it wasn't found."
        print "It's superior especially with non-US keyboard layouts."
        print "Try installing it with 'easy_install pyreadline (ctypes is required) or"
        print "svn co http://ipython.scipy.org/svn/ipython/pyreadline/trunk pyreadline"
        print "Trying 'old' windows readline."

        try:
            from readline import *
            have_readline = True
        except ImportError:
            pass

    if have_readline:
        try:
            _outputfile=GetOutputFile()
        except NameError:
            have_readline = False
    
else:
    try:
        from readline import *
        have_readline = True
    except ImportError:
        pass