human
Write me a the Python code you requested given the following:
Complete the below
@curry
def memoize(func, cache=None, key=None):

    ''''Cache a function\'s result for speedy future evaluation
    Considerations:
    Trades memory for speed.
    Only use on pure functions.
    >>> def add(x, y):  return x + y
    >>> add = memoize(add)
    Or use as a decorator
    >>> @memoize
    ... def add(x, y):
    ...     return x + y
    Use the ``cache`` keyword to provide a dict-like object as an initial cache
    >>> @memoize(cache={(1, 2): 3})
    ... def add(x, y):
    ...     return x + y
    Note that the above works as a decorator because ``memoize`` is curried.
    It is also possible to provide a ``key(args, kwargs)`` function that
    calculates keys used for the cache, which receives an ``args`` tuple and
    ``kwargs`` dict as input, and must return a hashable value.  However,
    the default key function should be sufficient most of the time.
    >>> # Use key function that ignores extraneous keyword arguments
    >>> @memoize(key=lambda args, kwargs: args)
    ... def add(x, y, verbose=False):
    ...     if verbose:
    ...         print(\'Calculating %s + %s\' % (x, y))
    ...     return x + y'
    '''
assistant
#Here is the Python code you requested.
    if (cache is None):
        cache = {}
    try:
        may_have_kwargs = (has_keywords(func) is not False)
        is_unary = is_arity(1, func)
    except TypeError:
        may_have_kwargs = True
        is_unary = False
    if (key is None):
        if is_unary:
            def key(args, kwargs):
                return args[0]
        elif may_have_kwargs:
            def key(args, kwargs):
                return ((args or None), (frozenset(kwargs.items()) if kwargs else None))
        else:
            def key(args, kwargs):
                return args
    def memof(*args, **kwargs):
        k = key(args, kwargs)
        try:
            return cache[k]
        except TypeError:
            raise TypeError('Arguments    to    memoized    function    must    be    hashable')
        except KeyError:
            cache[k] = result = func(*args, **kwargs)
            return result
    try:
        memof.__name__ = func.__name__
    except AttributeError:
        pass
    memof.__doc__ = func.__doc__
    memof.__wrapped__ = func
    return memof