Accidental Python class method override

>>> class A(object):
        def __init__(self, **kwargs):
            for key, value in kwargs.items():
                setattr(self, key, value)
        def method(self):
            print(self.__dict__)

>>> a = A(x=1, y=2)
>>> a.method()
{'a': 1, 'b': 2}

>>> a = A(x=1, y=2, method="blah")
>>> a.method()
Traceback (most recent call last):
  File "/python3.5/site-packages/IPython/core/interactiveshell.py", line 281, in run_code
    exec(code_obj, self.user_global_ns, self.user_ns)
  File "<ipython-input-29-76ebeb9909f4>", line 1, in <module>
    a.method()
TypeError: 'str' object is not callable