python - Flip 0 and 1 bits in pandas DataFrame efficiently?

Question

I had an issue switching a binary variable in-place for a large DF... this ended up working; posting in case this is an issue for another user.

dfSet2['TargetDefault'] = dfSet2.apply(
    lambda x: (0 if x['TargetDefault']==1 else 1), axis=1)

Is there a faster/easier way to do this?

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标签： pythonpandasdataframe

Answer 1

这很简单

dfSet2['TargetDefault'] = 1 - dfSet2['TargetDefault']