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Diffstat (limited to 'Lib/xml/dom/minicompat.py')
-rw-r--r-- | Lib/xml/dom/minicompat.py | 184 |
1 files changed, 0 insertions, 184 deletions
diff --git a/Lib/xml/dom/minicompat.py b/Lib/xml/dom/minicompat.py deleted file mode 100644 index 9f2f8f7..0000000 --- a/Lib/xml/dom/minicompat.py +++ /dev/null @@ -1,184 +0,0 @@ -"""Python version compatibility support for minidom.""" - -# This module should only be imported using "import *". -# -# The following names are defined: -# -# isinstance -- version of the isinstance() function that accepts -# tuples as the second parameter regardless of the -# Python version -# -# NodeList -- lightest possible NodeList implementation -# -# EmptyNodeList -- lightest possible NodeList that is guarateed to -# remain empty (immutable) -# -# StringTypes -- tuple of defined string types -# -# GetattrMagic -- base class used to make _get_<attr> be magically -# invoked when available -# defproperty -- function used in conjunction with GetattrMagic; -# using these together is needed to make them work -# as efficiently as possible in both Python 2.2+ -# and older versions. For example: -# -# class MyClass(GetattrMagic): -# def _get_myattr(self): -# return something -# -# defproperty(MyClass, "myattr", -# "return some value") -# -# For Python 2.2 and newer, this will construct a -# property object on the class, which avoids -# needing to override __getattr__(). It will only -# work for read-only attributes. -# -# For older versions of Python, inheriting from -# GetattrMagic will use the traditional -# __getattr__() hackery to achieve the same effect, -# but less efficiently. -# -# defproperty() should be used for each version of -# the relevant _get_<property>() function. -# -# NewStyle -- base class to cause __slots__ to be honored in -# the new world -# -# True, False -- only for Python 2.2 and earlier - -__all__ = ["NodeList", "EmptyNodeList", "NewStyle", - "StringTypes", "defproperty", "GetattrMagic"] - -import xml.dom - -try: - unicode -except NameError: - StringTypes = type(''), -else: - StringTypes = type(''), type(unicode('')) - - -# define True and False only if not defined as built-ins -try: - True -except NameError: - True = 1 - False = 0 - __all__.extend(["True", "False"]) - - -try: - isinstance('', StringTypes) -except TypeError: - # - # Wrap isinstance() to make it compatible with the version in - # Python 2.2 and newer. - # - _isinstance = isinstance - def isinstance(obj, type_or_seq): - try: - return _isinstance(obj, type_or_seq) - except TypeError: - for t in type_or_seq: - if _isinstance(obj, t): - return 1 - return 0 - __all__.append("isinstance") - - -if list is type([]): - class NodeList(list): - __slots__ = () - - def item(self, index): - if 0 <= index < len(self): - return self[index] - - def _get_length(self): - return len(self) - - def _set_length(self, value): - raise xml.dom.NoModificationAllowedErr( - "attempt to modify read-only attribute 'length'") - - length = property(_get_length, _set_length, - doc="The number of nodes in the NodeList.") - - def __getstate__(self): - return list(self) - - def __setstate__(self, state): - self[:] = state - - class EmptyNodeList(tuple): - __slots__ = () - - def __add__(self, other): - NL = NodeList() - NL.extend(other) - return NL - - def __radd__(self, other): - NL = NodeList() - NL.extend(other) - return NL - - def item(self, index): - return None - - def _get_length(self): - return 0 - - def _set_length(self, value): - raise xml.dom.NoModificationAllowedErr( - "attempt to modify read-only attribute 'length'") - - length = property(_get_length, _set_length, - doc="The number of nodes in the NodeList.") - -else: - def NodeList(): - return [] - - def EmptyNodeList(): - return [] - - -try: - property -except NameError: - def defproperty(klass, name, doc): - # taken care of by the base __getattr__() - pass - - class GetattrMagic: - def __getattr__(self, key): - if key.startswith("_"): - raise AttributeError, key - - try: - get = getattr(self, "_get_" + key) - except AttributeError: - raise AttributeError, key - return get() - - class NewStyle: - pass - -else: - def defproperty(klass, name, doc): - get = getattr(klass, ("_get_" + name)).im_func - def set(self, value, name=name): - raise xml.dom.NoModificationAllowedErr( - "attempt to modify read-only attribute " + repr(name)) - assert not hasattr(klass, "_set_" + name), \ - "expected not to find _set_" + name - prop = property(get, set, doc=doc) - setattr(klass, name, prop) - - class GetattrMagic: - pass - - NewStyle = object |