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Quick pdb trick for pipe-ers, you can stick this in the middle:

.pipe(lambda df: (df, pdb.set_trace())[0])

I use .pipe(lambda x: x....) very often in my code, makes it feel more like I'm using dplyr...

.pipe is very very slow.

df.pipe(f, ...) is just syntactic sugar for f(df, ...). Nothing slow about it.

Executing functions in python is slow!