##// END OF EJS Templates
Fixed imports and removed references to ETS/EPD
Fixed imports and removed references to ETS/EPD

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r2498:3eae1372
r2603:c58e310c
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display_trap.py
75 lines | 2.2 KiB | text/x-python | PythonLexer
Brian Granger
sys.displayhook is now managed dynamically by display_trap.
r2231 #!/usr/bin/env python
# encoding: utf-8
"""
A context manager for handling sys.displayhook.
Authors:
* Robert Kern
* 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
from IPython.core.component import Component
#-----------------------------------------------------------------------------
# Classes and functions
#-----------------------------------------------------------------------------
class DisplayTrap(Component):
"""Object to manage sys.displayhook.
This came from IPython.core.kernel.display_hook, but is simplified
(no callbacks or formatters) until more of the core is refactored.
"""
def __init__(self, parent, hook):
super(DisplayTrap, self).__init__(parent, None, None)
self.hook = hook
self.old_hook = None
Brian Granger
Massive refactoring of of the core....
r2245 # We define this to track if a single BuiltinTrap is nested.
# Only turn off the trap when the outermost call to __exit__ is made.
self._nested_level = 0
Brian Granger
sys.displayhook is now managed dynamically by display_trap.
r2231
Brian Granger
Work on refactoring ipcontroller to new config system.
r2287 # @auto_attr
# def shell(self):
# return Component.get_instances(
# root=self.root,
# klass='IPython.core.iplib.InteractiveShell')[0]
Brian Granger
More work on refactoring things into components....
r2244
Brian Granger
sys.displayhook is now managed dynamically by display_trap.
r2231 def __enter__(self):
Brian Granger
Massive refactoring of of the core....
r2245 if self._nested_level == 0:
self.set()
self._nested_level += 1
Brian Granger
sys.displayhook is now managed dynamically by display_trap.
r2231 return self
def __exit__(self, type, value, traceback):
Brian Granger
Massive refactoring of of the core....
r2245 if self._nested_level == 1:
self.unset()
self._nested_level -= 1
Brian Granger
The pretty.py extension has been ported to the new extension API....
r2281 # Returning False will cause exceptions to propagate
return False
Brian Granger
sys.displayhook is now managed dynamically by display_trap.
r2231
def set(self):
"""Set the hook."""
if sys.displayhook is not self.hook:
self.old_hook = sys.displayhook
sys.displayhook = self.hook
def unset(self):
"""Unset the hook."""
sys.displayhook = self.old_hook