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EdisonChendi/default_params.py

Created November 27, 2016 08:25
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don't use mutable types as default parameters
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default_params.py
# coding=UTF-8
def append(newitem, l = []):
l.append(newitem)
print(l)
print(append.func_defaults) # []
append(10)
print(append.func_defaults) # [10]
append(20)
print(append.func_defaults) # [10, 20]
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