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Solve the following problem using Python, implementing the functions described below, one line at a time
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<USER_TASK:>
Description:
 def dict_of(validate_key, validate_item):
 """Returns a validator function that succeeds only if the input is a dict, and each key and value in the dict passes as input to the provided validators validate_key and validate_item, respectively. :param callable validate_key: the validator function for keys in the dict :param callable validate_item: the validator function for values in the list :returns: a function which returns True its input is an dict of valid items, and raises TypeError otherwise :rtype: callable """

    def validate(value, should_raise=True):
        validate_type = is_type(dict)
        if not validate_type(value, should_raise=should_raise):
            return False

        for key, item in value.items():
            try:
                validate_key(key)
            except TypeError as e:
                if should_raise:
                    samtranslator.model.exceptions.prepend(e, "dict contained an invalid key")
                    raise
                return False

            try:
                validate_item(item)
            except TypeError as e:
                if should_raise:
                    samtranslator.model.exceptions.prepend(e, "dict contained an invalid value")
                    raise
                return False
        return True
    return validate