查看DA的源代码

=== Reverse operation of value_counts() ===

<source lang=python>
>>> col = pd.Series([1.0, 1.0, 2.0, 3.0, 3.0, 3.0])
>>> cc =col.value_counts()
>>> cc
3.0    3
1.0    2
2.0    1
>>> np.repeat(cc.index, cc)
Float64Index([3.0, 3.0, 3.0, 1.0, 1.0, 2.0], dtype='float64')
>>> pd.Series(np.repeat(cc.index, cc))
0    3.0
1    3.0
2    3.0
3    1.0
4    1.0
5    2.0
</source>

For multiple columns you can use:

<source lang=python>
>>> df.loc[df.index.repeat(df['Count'])]
</source>

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