A simple auto append list.

list_05_autoappend.py

from collections import UserList


class AutoAppendList(UserList):
    """
    AutoAppendList. Will append an item if you are off by one index assignment.
    >>> aal: AutoAppendList = AutoAppendList()
    >>> for i in range(10):
    ...     aal[i] = i
    >>> print(aal)
    [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
    """
    def __setitem__(self, index, item):
        """__setitem__.

        Args:
            index:
            item:
        """
        if index == len(self.data):
            self.data.append(item)
        else:
            self.data[i] = item


aal: AutoAppendList = AutoAppendList()

for iteration, char in enumerate("hello"):
    aal[iteration] = ord(char)

assert aal == [104, 101, 108, 108, 111]