摘录一段关于判断处理停牌股票的python用法
Applying a boolean mask to a dataframe :
In a dataframe we can apply a boolean mask in order to do that we, can use __getitems__ or [] accessor. We can apply a boolean mask by giving list of True and False of the same length as contain in a dataframe. When we apply a boolean mask it will print only that dataframe in which we pass a boolean value True.
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