Question

So knowing what an iterator is, I’m assumign a string is an iterable object because the following is possible:

for c in str:
  print c

I am subclassing str and overriding __hash__ and __eq__. In __hash__, I am trying to iterate over the string as follows:

for c in self.__str__:

The following error however returns: TypeError: 'method-wrapper' object is not iterable. This means that __str__ is not iterable. How do I get an iterable version of the string? I tried looking up some sort of str object API on Python but Python’s documentation only shows you how to use a string, and not what the internals are, and which object in str is iterable.

How can I iterate through my subclassed string, within my string object?

Answer 1

__str__ is another hook method, and not the value of the string.

If this is a subclass of str, you can just iterate over self instead:

for c in self:

or you can make it more explicit:

for c in iter(self):

If this is not a subclass, perhaps you meant to call __str__():

for c in self.__str__():

or you can avoid calling the hook and use str():

for c in str(self):