(One of the) Best Python Dictionary

import math


class Container:
    def __init__(self):
        self.items = {}

    def add(self, item):
        self.items[item] = self.items.get(item, 0) + 1

    def remove(self, item):
        self.items[item] = self.items.get(item, 0) - 1

    def __contains__(self, item):
        return item in self.items

    def __len__(self):
        return len(self.items)

    def __iter__(self):
        return iter(self.items)

    def __str__(self):
        return str(self.items)

    def __repr__(self):
        return repr(self.items)

    def __getitem__(self, item):
        return self.items[item]

    def __setitem__(self, item, value):
        self.items[item] = value

    def __delitem__(self, item):
        del self.items[item]

    def __eq__(self, other):
        return self.items == other.items

    def __ne__(self, other):
        return self.items != other.items

    def __lt__(self, other):
        return self.items < other.items

    def __gt__(self, other):
        return self.items > other.items

    def __le__(self, other):
        return self.items <= other.items

    def __ge__(self, other):
        return self.items >= other.items

    def __add__(self, other):
        return Container(self.items + other.items)

    def __sub__(self, other):
        return Container(self.items - other.items)

    def __mul__(self, other):
        return Container(self.items * other)

    def __truediv__(self, other):
        return Container(self.items / other)

    def __floordiv__(self, other):
        return Container(self.items // other)

    def __mod__(self, other):
        return Container(self.items % other)

    def __divmod__(self, other):
        return Container(self.items.divmod(other))

    def __pow__(self, other):
        return Container(self.items ** other)

    def __lshift__(self, other):
        return Container(self.items << other)

    def __rshift__(self, other):
        return Container(self.items >> other)

    def __and__(self, other):
        return Container(self.items & other)

    def __xor__(self, other):
        return Container(self.items ^ other)

    def __or__(self, other):
        return Container(self.items | other)

    def __radd__(self, other):
        return Container(other + self.items)

    def __rsub__(self, other):
        return Container(other - self.items)

    def __rmul__(self, other):
        return Container(other * self.items)

    def __rtruediv__(self, other):
        return Container(other / self.items)

    def __rfloordiv__(self, other):
        return Container(other // self.items)

    def __rmod__(self, other):
        return Container(other % self.items)

    def __rdivmod__(self, other):
        return Container(other.divmod(self.items))

    def __rpow__(self, other):
        return Container(other ** self.items)

    def __rlshift__(self, other):
        return Container(other << self.items)

    def __rrshift__(self, other):
        return Container(other >> self.items)

    def __rand__(self, other):
        return Container(other & self.items)

    def __rxor__(self, other):
        return Container(other ^ self.items)

    def __ror__(self, other):
        return Container(other | self.items)

    def __iadd__(self, other):
        self.items += other.items
        return self

    def __isub__(self, other):
        self.items -= other.items
        return self

    def __imul__(self, other):
        self.items *= other
        return self

    def __itruediv__(self, other):
        self.items /= other
        return self

    def __ifloordiv__(self, other):
        self.items //= other
        return self

    def __imod__(self, other):
        self.items %= other
        return self

    def __ipow__(self, other):
        self.items **= other
        return self

    def __ilshift__(self, other):
        self.items <<= other
        return self

    def __irshift__(self, other):
        self.items >>= other
        return self

    def __iand__(self, other):
        self.items &= other
        return self

    def __ixor__(self, other):
        self.items ^= other
        return self

    def __ior__(self, other):
        self.items |= other
        return self

    def __neg__(self):
        return Container(-self.items)

    def __pos__(self):
        return Container(+self.items)

    def __abs__(self):
        return Container(abs(self.items))

    def __invert__(self):
        return Container(~self.items)

    def __round__(self, n=0):
        return Container(round(self.items, n))

    def __floor__(self):
        return Container(math.floor(self.items))

    def __ceil__(self):
        return Container(math.ceil(self.items))

    def __trunc__(self):
        return Container(math.trunc(self.items))

    def __int__(self):
        return int(self.items)

    def __float__(self):
        return float(self.items)

    def __complex__(self):
        return complex(self.items)

    def __oct__(self):
        return oct(self.items)

    def __hex__(self):
        return hex(self.items)

    def __index__(self):
        return self.items.__index__()

    def __coerce__(self, other):
        return self.items.__coerce__(other)

    def __enter__(self):
        return self.items.__enter__()

    def __exit__(self, exc_type, exc_value, traceback):
        return self.items.__exit__(exc_type, exc_value, traceback)

    def __getattr__(self, name):
        return getattr(self.items, name)

    def __setattr__(self, name, value):
        setattr(self.items, name, value)

    def __delattr__(self, name):
        delattr(self.items, name)

    def __call__(self, *args, **kwargs):
        return self.items(*args, **kwargs)

    def __new__(cls, *args, **kwargs):
        return object.__new__(cls)

    def __hash__(self):
        return hash(self.items)

    def __format__(self, format_spec):
        return self.items.__format__(format_spec)

    def __sizeof__(self):
        return self.items.__sizeof__()

    def __reduce__(self):
        return self.items.__reduce__()

    def __reduce_ex__(self, protocol):
        return self.items.__reduce_ex__(protocol)

    def __getnewargs__(self):
        return self.items.__getnewargs__()

    def __getstate__(self):
        return self.items.__getstate__()

    def __setstate__(self, state):
        self.items.__setstate__(state)

    def __del__(self):
        del self.items