python, hg: tow outside the environment.

they've served us well, and can ride off into the sunset.

1 files changed, 0 insertions, 141 deletions

diff --git a/sys/src/cmd/python/Demo/newmetaclasses/Eiffel.py b/sys/src/cmd/python/Demo/newmetaclasses/Eiffel.py
deleted file mode 100644
index 04f991585..000000000
--- a/sys/src/cmd/python/Demo/newmetaclasses/Eiffel.py
+++ /dev/null
@@ -1,141 +0,0 @@
-"""Support Eiffel-style preconditions and postconditions."""
-
-from new import function
-
-class EiffelBaseMetaClass(type):
-
-    def __new__(meta, name, bases, dict):
-        meta.convert_methods(dict)
-        return super(EiffelBaseMetaClass, meta).__new__(meta, name, bases,
-                                                        dict)
-
-    @classmethod
-    def convert_methods(cls, dict):
-        """Replace functions in dict with EiffelMethod wrappers.
-
-        The dict is modified in place.
-
-        If a method ends in _pre or _post, it is removed from the dict
-        regardless of whether there is a corresponding method.
-        """
-        # find methods with pre or post conditions
-        methods = []
-        for k, v in dict.iteritems():
-            if k.endswith('_pre') or k.endswith('_post'):
-                assert isinstance(v, function)
-            elif isinstance(v, function):
-                methods.append(k)
-        for m in methods:
-            pre = dict.get("%s_pre" % m)
-            post = dict.get("%s_post" % m)
-            if pre or post:
-                dict[k] = cls.make_eiffel_method(dict[m], pre, post)
-
-class EiffelMetaClass1(EiffelBaseMetaClass):
-    # an implementation of the "eiffel" meta class that uses nested functions
-
-    @staticmethod
-    def make_eiffel_method(func, pre, post):
-        def method(self, *args, **kwargs):
-            if pre:
-                pre(self, *args, **kwargs)
-            x = func(self, *args, **kwargs)
-            if post:
-                post(self, x, *args, **kwargs)
-            return x
-
-        if func.__doc__:
-            method.__doc__ = func.__doc__
-
-        return method
-
-class EiffelMethodWrapper:
-
-    def __init__(self, inst, descr):
-        self._inst = inst
-        self._descr = descr
-
-    def __call__(self, *args, **kwargs):
-        return self._descr.callmethod(self._inst, args, kwargs)
-
-class EiffelDescriptor(object):
-
-    def __init__(self, func, pre, post):
-        self._func = func
-        self._pre = pre
-        self._post = post
-
-        self.__name__ = func.__name__
-        self.__doc__ = func.__doc__
-
-    def __get__(self, obj, cls):
-        return EiffelMethodWrapper(obj, self)
-
-    def callmethod(self, inst, args, kwargs):
-        if self._pre:
-            self._pre(inst, *args, **kwargs)
-        x = self._func(inst, *args, **kwargs)
-        if self._post:
-            self._post(inst, x, *args, **kwargs)
-        return x
-
-class EiffelMetaClass2(EiffelBaseMetaClass):
-    # an implementation of the "eiffel" meta class that uses descriptors
-
-    make_eiffel_method = EiffelDescriptor
-
-def _test(metaclass):
-    class Eiffel:
-        __metaclass__ = metaclass
-
-    class Test(Eiffel):
-
-        def m(self, arg):
-            """Make it a little larger"""
-            return arg + 1
-
-        def m2(self, arg):
-            """Make it a little larger"""
-            return arg + 1
-
-        def m2_pre(self, arg):
-            assert arg > 0
-
-        def m2_post(self, result, arg):
-            assert result > arg
-
-    class Sub(Test):
-        def m2(self, arg):
-            return arg**2
-        def m2_post(self, Result, arg):
-            super(Sub, self).m2_post(Result, arg)
-            assert Result < 100
-
-    t = Test()
-    t.m(1)
-    t.m2(1)
-    try:
-        t.m2(0)
-    except AssertionError:
-        pass
-    else:
-        assert False
-
-    s = Sub()
-    try:
-        s.m2(1)
-    except AssertionError:
-        pass # result == arg
-    else:
-        assert False
-    try:
-        s.m2(10)
-    except AssertionError:
-        pass # result ==  100
-    else:
-        assert False
-    s.m2(5)
-
-if __name__ == "__main__":
-    _test(EiffelMetaClass1)
-    _test(EiffelMetaClass2)