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[英]Check if one column value is in another column and create column to indicate in Pandas
[英]Check if a value in one column is in a list in another column
传递参数axis=1
以apply
逐行迭代:
In [49]:
df[df.apply(lambda x: x['city'].lower() in x['citylist'], axis=1)]
Out[49]:
city citylist
1 RESTON [reston, herndon]
4 SPRINGFIELD [springfield, west springfield]
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