您可以使用来执行此操作DataFrame.apply，该功能会沿给定轴应用功能，
In [3]: df = pandas.DataFrame(np.random.randn(5, 3), columns=['a', 'b', 'c'])
In [4]: df
Out[4]:
a b c
0 -0.001968 -1.877945 -1.515674
1 -0.540628 0.793913 -0.983315
2 -1.313574 1.946410 0.826350
3 0.015763 -0.267860 -2.228350
4 0.563111 1.195459 0.343168
In [6]: df[df.apply(lambda x: x['b'] > x['c'], axis=1)]
Out[6]:
a b c
1 -0.540628 0.793913 -0.983315
2 -1.313574 1.946410 0.826350
3 0.015763 -0.267860 -2.228350
4 0.563111 1.195459 0.343168
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