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Speedup builtin_trap enter/exit by reducing object creation....
Speedup builtin_trap enter/exit by reducing object creation. Most of the work that was being done on *every* enter/exit cycle could be done statically only once, at object creation time. This trap is used on every single code execution, so we need it to be fast. In the long run we probably want to rethink this system altogether, but for now at least we want it fast.
Brian E Granger - - Load All Authors

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display_formatter.py
70 lines | 1.8 KiB | text/x-python | PythonLexer
/ IPython / kernel / core / display_formatter.py
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# encoding: utf-8
"""Objects for replacing sys.displayhook()."""
__docformat__ = "restructuredtext en"
#-------------------------------------------------------------------------------
# Copyright (C) 2008 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
#-------------------------------------------------------------------------------
class IDisplayFormatter(object):
""" Objects conforming to this interface will be responsible for formatting
representations of objects that pass through sys.displayhook() during an
interactive interpreter session.
"""
# The kind of formatter.
kind = 'display'
# The unique identifier for this formatter.
identifier = None
def __call__(self, obj):
""" Return a formatted representation of an object.
Return None if one cannot return a representation in this format.
"""
raise NotImplementedError
class ReprDisplayFormatter(IDisplayFormatter):
""" Return the repr() string representation of an object.
"""
# The unique identifier for this formatter.
identifier = 'repr'
def __call__(self, obj):
""" Return a formatted representation of an object.
"""
return repr(obj)
class PPrintDisplayFormatter(IDisplayFormatter):
""" Return a pretty-printed string representation of an object.
"""
# The unique identifier for this formatter.
identifier = 'pprint'
def __call__(self, obj):
""" Return a formatted representation of an object.
"""
import pprint
return pprint.pformat(obj)