Default list

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examples/functions/default_list.py

# don't use complex data structures as default values
def extend_and_print(names = []):
    names.append("cat")
    print(names)


extend_and_print()
extend_and_print()

def fixed(names = None):
    if names is None:
        names = []
    names.append("dog")
    print(names)


fixed()
fixed()