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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def starts_with(self, other: 'Key') -> bool: """ Checks if this key starts with the other key provided. Returns False if key_type, identity or group are different. For `KeyType.TIMESTAMP` returns True. For `KeyType.DIMENSION` does prefix match between the two dimensions property. """

        if (self.key_type, self.identity, self.group) != (other.key_type, other.identity,
                                                          other.group):
            return False
        if self.key_type == KeyType.TIMESTAMP:
            return True
        if self.key_type == KeyType.DIMENSION:
            if len(self.dimensions) < len(other.dimensions):
                return False
            return self.dimensions[0:len(other.dimensions)] == other.dimensions