在不考虑为什么要这样做的优点的情况下，可以采用以下方法：
# assume the file is saved as "temp.py"
import inspect
class RegisteredObject(object):
def __new__(cls, *args, **kwargs):
new_instance = super(RegisteredObject, cls).__new__(cls, *args, **kwargs)
stack_trace = inspect.stack()
created_at = '%s:%d' % (
stack_trace[1][1], stack_trace[1][2])
new_instance.created_at = created_at
return new_instance
def get_file_of_object_creation(self):
return self.created_at
class MyObject(RegisteredObject):
pass
def create_A():
return MyObject()
def create_B():
return MyObject()
if __name__ == '__main__':
t1 = create_A()
t2 = create_B()
t3 = create_A()
t4 = create_B()
t5 = MyObject()
print '"t1" was created at "%s"' % t1.get_file_of_object_creation()
print '"t2" was created at "%s"' % t2.get_file_of_object_creation()
print '"t3" was created at "%s"' % t3.get_file_of_object_creation()
print '"t4" was created at "%s"' % t4.get_file_of_object_creation()
print '"t5" was created at "%s"' % t5.get_file_of_object_creation()
输出：
$ python temp.py
"t1" was created at "temp.py:19"
"t2" was created at "temp.py:22"
"t3" was created at "temp.py:19"
"t4" was created at "temp.py:22"
"t5" was created at "temp.py:29"
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