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| author | darylm503 <darylm503@6f19259b-4bc3-4df7-8a09-765794883524> | 2012-04-16 22:12:42 +0000 |
|---|---|---|
| committer | darylm503 <darylm503@6f19259b-4bc3-4df7-8a09-765794883524> | 2012-04-16 22:12:42 +0000 |
| commit | 4710c53dcad1ebf3755f3efb9e80ac24bd72a9b2 (patch) | |
| tree | 2d17d2388a78082e32f6a97120d707328143543b /AppPkg/Applications/Python/Python-2.7.2/Demo/metaclasses/Meta.py | |
| parent | cbc6b5e54599c7391ece99ad3c5313f4dd4ddda6 (diff) | |
| download | edk2-platforms-4710c53dcad1ebf3755f3efb9e80ac24bd72a9b2.tar.xz | |
AppPkg/Applications/Python: Add Python 2.7.2 sources since the release of Python 2.7.3 made them unavailable from the python.org web site.
These files are a subset of the python-2.7.2.tgz distribution from python.org. Changed files from PyMod-2.7.2 have been copied into the corresponding directories of this tree, replacing the original files in the distribution.
Signed-off-by: daryl.mcdaniel@intel.com
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@13197 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'AppPkg/Applications/Python/Python-2.7.2/Demo/metaclasses/Meta.py')
| -rw-r--r-- | AppPkg/Applications/Python/Python-2.7.2/Demo/metaclasses/Meta.py | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/AppPkg/Applications/Python/Python-2.7.2/Demo/metaclasses/Meta.py b/AppPkg/Applications/Python/Python-2.7.2/Demo/metaclasses/Meta.py new file mode 100644 index 0000000000..b262a8021c --- /dev/null +++ b/AppPkg/Applications/Python/Python-2.7.2/Demo/metaclasses/Meta.py @@ -0,0 +1,118 @@ +"""Generic metaclass.
+
+XXX This is very much a work in progress.
+
+"""
+
+import types
+
+class MetaMethodWrapper:
+
+ def __init__(self, func, inst):
+ self.func = func
+ self.inst = inst
+ self.__name__ = self.func.__name__
+
+ def __call__(self, *args, **kw):
+ return apply(self.func, (self.inst,) + args, kw)
+
+class MetaHelper:
+
+ __methodwrapper__ = MetaMethodWrapper # For derived helpers to override
+
+ def __helperinit__(self, formalclass):
+ self.__formalclass__ = formalclass
+
+ def __getattr__(self, name):
+ # Invoked for any attr not in the instance's __dict__
+ try:
+ raw = self.__formalclass__.__getattr__(name)
+ except AttributeError:
+ try:
+ ga = self.__formalclass__.__getattr__('__usergetattr__')
+ except (KeyError, AttributeError):
+ raise AttributeError, name
+ return ga(self, name)
+ if type(raw) != types.FunctionType:
+ return raw
+ return self.__methodwrapper__(raw, self)
+
+class MetaClass:
+
+ """A generic metaclass.
+
+ This can be subclassed to implement various kinds of meta-behavior.
+
+ """
+
+ __helper__ = MetaHelper # For derived metaclasses to override
+
+ __inited = 0
+
+ def __init__(self, name, bases, dict):
+ try:
+ ga = dict['__getattr__']
+ except KeyError:
+ pass
+ else:
+ dict['__usergetattr__'] = ga
+ del dict['__getattr__']
+ self.__name__ = name
+ self.__bases__ = bases
+ self.__realdict__ = dict
+ self.__inited = 1
+
+ def __getattr__(self, name):
+ try:
+ return self.__realdict__[name]
+ except KeyError:
+ for base in self.__bases__:
+ try:
+ return base.__getattr__(name)
+ except AttributeError:
+ pass
+ raise AttributeError, name
+
+ def __setattr__(self, name, value):
+ if not self.__inited:
+ self.__dict__[name] = value
+ else:
+ self.__realdict__[name] = value
+
+ def __call__(self, *args, **kw):
+ inst = self.__helper__()
+ inst.__helperinit__(self)
+ try:
+ init = inst.__getattr__('__init__')
+ except AttributeError:
+ init = lambda: None
+ apply(init, args, kw)
+ return inst
+
+
+Meta = MetaClass('Meta', (), {})
+
+
+def _test():
+ class C(Meta):
+ def __init__(self, *args):
+ print "__init__, args =", args
+ def m1(self, x):
+ print "m1(x=%r)" % (x,)
+ print C
+ x = C()
+ print x
+ x.m1(12)
+ class D(C):
+ def __getattr__(self, name):
+ if name[:2] == '__': raise AttributeError, name
+ return "getattr:%s" % name
+ x = D()
+ print x.foo
+ print x._foo
+## print x.__foo
+## print x.__foo__
+
+
+if __name__ == '__main__':
+ _test()
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