@ -482,6 +482,14 @@ class Pattern:
"""
return copy.deepcopy(self)
def is_empty(self) -> bool:
Returns true if the Pattern contains no shapes, labels, or subpatterns.
:return: True if the pattern is empty.
return (len(self.subpatterns) == 0 and len(self.shapes) == 0 and len(self.labels) == 0)
@staticmethod
def load(filename: str) -> 'Pattern':