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class ImmutableDict(dict):
    """
    Based on borrowed code from:
    https://github.com/DasIch/brownie/blob/master/brownie/datastructures/mappings.py

    >>> d=ImmutableDict({"A":1})
    >>> d
    ImmutableDict({'A': 1})
    >>> d["A"] = 2
    Traceback (most recent call last):
        ...
    TypeError: 'ImmutableDict' objects are immutable
    """
    @classmethod
    def raise_immutable(cls, *args, **kwargs):
        raise TypeError('%r objects are immutable' % cls.__name__)

    __setitem__ = __delitem__ = setdefault = update = pop = popitem = clear = \
        raise_immutable

    def __repr__(self):
        content = dict.__repr__(self) if self else ''
        return '%s(%s)' % (self.__class__.__name__, content)