def file_module_function_of(self, frame):
code = frame.f_code
filename = code.co_filename
if filename:
modulename = modname(filename)
else:
modulename = None
funcname = code.co_name
clsname = None
if code in self._caller_cache:
if self._caller_cache[code] is not None:
clsname = self._caller_cache[code]
else:
self._caller_cache[code] = None
## use of gc.get_referrers() was suggested by Michael Hudson
# all functions which refer to this code object
funcs = [f for f in gc.get_referrers(code)
if inspect.isfunction(f)]
# require len(func) == 1 to avoid ambiguity caused by calls to
# new.function(): "In the face of ambiguity, refuse the
# temptation to guess."
if len(funcs) == 1:
dicts = [d for d in gc.get_referrers(funcs[0])
if isinstance(d, dict)]
if len(dicts) == 1:
classes = [c for c in gc.get_referrers(dicts[0])
if hasattr(c, "__bases__")]
if len(classes) == 1:
# ditto for new.classobj()
clsname = classes[0].__name__
# cache the result - assumption is that new.* is
# not called later to disturb this relationship
# _caller_cache could be flushed if functions in
# the new module get called.
self._caller_cache[code] = clsname
if clsname is not None:
funcname = "%s.%s" % (clsname, funcname)
return filename, modulename, funcname
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