Why does pycharm propose to change method to static

Why does pycharm propose to change method to static

方法一：
def bar(self):
    self.is_not_used()
    doing_something_without_self()

def is_not_used(self):
    pass

　方法二：

# noinspection PyMethodMayBeStatic
def bar(self):
    doing_something_without_self()
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原文地址：https://www.cnblogs.com/coodyz/p/11335140.html