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Multiple improvements to tab completion....
Multiple improvements to tab completion. I refactored the API quite a bit, to retain readline compatibility but make it more independent of readline. There's still more to do in cleaning up our init_readline() method, but now the completer objects have separate rlcomplete() and complete() methods. The former uses the quirky readline API with a state flag, while the latter is stateless, takes only text information, and is more suitable for GUIs and other frontends to call programatically. Made other minor fixes to ensure the test suite passes in full. While all this code is a bit messy, we're getting in the direction of the APIs we need in the long run.
Brian Granger - - Load All Authors

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syspathcontext.py
70 lines | 2.0 KiB | text/x-python | PythonLexer
/ IPython / utils / syspathcontext.py
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#!/usr/bin/env python
# encoding: utf-8
"""
Context managers for adding things to sys.path temporarily.
Authors:
* Brian Granger
"""
#-----------------------------------------------------------------------------
# Copyright (C) 2008-2009 The IPython Development Team
#
# Distributed under the terms of the BSD License. The full license is in
# the file COPYING, distributed as part of this software.
#-----------------------------------------------------------------------------
#-----------------------------------------------------------------------------
# Imports
#-----------------------------------------------------------------------------
import sys
#-----------------------------------------------------------------------------
# Code
#-----------------------------------------------------------------------------
class appended_to_syspath(object):
"""A context for appending a directory to sys.path for a second."""
def __init__(self, dir):
self.dir = dir
def __enter__(self):
if self.dir not in sys.path:
sys.path.append(self.dir)
self.added = True
else:
self.added = False
def __exit__(self, type, value, traceback):
if self.added:
try:
sys.path.remove(self.dir)
except ValueError:
pass
# Returning False causes any exceptions to be re-raised.
return False
class prepended_to_syspath(object):
"""A context for prepending a directory to sys.path for a second."""
def __init__(self, dir):
self.dir = dir
def __enter__(self):
if self.dir not in sys.path:
sys.path.insert(0,self.dir)
self.added = True
else:
self.added = False
def __exit__(self, type, value, traceback):
if self.added:
try:
sys.path.remove(self.dir)
except ValueError:
pass
# Returning False causes any exceptions to be re-raised.
return False