diff options
Diffstat (limited to 'Demo/metaclasses/Trace.py')
| -rw-r--r-- | Demo/metaclasses/Trace.py | 29 |
1 files changed, 24 insertions, 5 deletions
diff --git a/Demo/metaclasses/Trace.py b/Demo/metaclasses/Trace.py index ed3944f..a5b765a 100644 --- a/Demo/metaclasses/Trace.py +++ b/Demo/metaclasses/Trace.py @@ -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() + |