I know that python has a len() function that is used to determine the size of a string, but I was wondering why it’s not a method of the string object?
I know that python has a len() function that is used to determine the
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I know that python has a len() function that is used to determine the size of a string, but I was wondering why it’s not a method of the string object?
Strings do have a length method:
__len__()The protocol in Python is to implement this method on objects which have a length and use the built-in
len()function, which calls it for you, similar to the way you would implement__iter__()and use the built-initer()function (or have the method called behind the scenes for you) on objects which are iterable.See Emulating container types for more information.
Here’s a good read on the subject of protocols in Python: Python and the Principle of Least Astonishment