Creating your own List (python 3)

class List(object):
    def __init__(self, maxsize):
        self.__current_size = 0
        self.__maxsize = (maxsize + 1)
        self.__elems = {}

    def __setitem__(self, idx, elem):
        try:
            self.__current_size += 1
            if self.__current_size % self.__maxsize != 0:
                self.__elems[idx] = elem
            else:
                raise IndexError("Not supported index size")
        except Exception as e:
            raise e

    def __getitem__(self, idx):
        try:
            return self.__elems[idx]
        except IndexError as e:
            raise e

    def __repr__(self):
        return repr(filter(lambda el: el is not False,
                            [len(self.__elems[k]) > 0 and self.__elems[k] for k in self.__elems]))

    def __last_idx(self):
        try:
            return self.__elems.items()[-1][0]
        except IndexError:
            return 0

    def remove_item(self, elem):
        for item in self.__elems.items():
            if item[1] == elem:
                self.__current_size -= 1
                del self.__elems[item[0]]

    def pop(self):
        try:
            idx = self.__last_idx()
            self.__current_size -= 1
            del self.__elems[idx]
        except KeyError:
            self.__current_size = 0

    def append(self, elem):
        last_idx = self.__last_idx()
        try:
            self.__current_size += 1
            if self.__current_size % self.__maxsize != 0:
                self.__elems[last_idx + 1] = elem
            else:
                raise IndexError("Not supported index size")
        except Exception as e:
            raise e

mylist = List(2)
mylist.pop()
mylist.append("Hindaya")
print(mylist)