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Arbitrary point checkpoint commit. Take no notice.

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This commit is contained in:
Guido van Rossum 1997-08-25 15:37:59 +00:00
parent bff110f3f1
commit 27e4aa3168
4 changed files with 248 additions and 6 deletions
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29
Demo/metaclasses/Trace.py
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@ -1,6 +1,10 @@
"""Tracing metaclass."""
"""Tracing metaclass.
import types
XXX This is very much a work in progress.
"""
import types, sys
class TraceMetaClass:
"""Metaclass for tracing.
@ -28,7 +32,7 @@ class TraceMetaClass:
except KeyError:
for base in self.__bases__:
try:
return getattr(base, name)
return base.__getattr__(name)
except AttributeError:
pass
raise AttributeError, name
@ -106,12 +110,15 @@ Traced = TraceMetaClass('Traced', (), {'__trace_output__': None})
def _test():
import sys
global C, D
class C(Traced):
def __init__(self, x=0): self.x = x
def m1(self, x): self.x = x
def m2(self, y): return self.x + y
C.__trace_output__ = sys.stdout
__trace_output__ = sys.stdout
class D(C):
def m2(self, y): print "D.m2(%s)" % `y`; return C.m2(self, y)
__trace_output__ = None
x = C(4321)
print x
print x.x
@ -122,5 +129,17 @@ def _test():
print x.m2(4000)
print x.x
print C.__init__
print C.m2
print D.__init__
print D.m2
y = D()
print y
print y.m1(10)
print y.m2(100)
print y.x
if __name__ == '__main__':
_test()