Python3 is specified to use arrays of 8, 16, or 32 bit units, depending on the largest code point in the string. As a result, all code points in all strings are

Python3 is specified to use arrays of 8, 16, or 32 bit units, depending on the largest code point in the string. As a result, all code points in all strings are O(1) indexable. The claim that "Python 3 internally uses UTF-32" is simply false.