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这里定义了一个6行3列的DataFrame，其中有一个空值。

我们这里定义了一个pandas.Series,这个Series的index是'blue', 'red', 'yellow', 'white', 'green'对应的数值分别为5, 0, 3, 8, 4，当我们调用pandas.Series.rank方法时可以看到这个Series…

Pandas provides a suite of methods in order to get purely integer based indexing. The .iloc attribute is the primary access method. The fol…

pandas provides a suite of methods in order to have purely label based indexing. The .loc attribute is the primary access method. The follo…