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How can I square each element of a column/series of a DataFrame in pandas (and create another column to hold the result)?

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The following piece of code works for me: 

>>> import pandas as pd

>>> df = pd.DataFrame([[1,2],[3,4]], columns=list('ab'))

>>> df

   a  b

0  1  2

1  3  4

>>> df['c'] = df['b']**2

>>> df

   a  b   c

0  1  2   4

1  3  4  16

If you wish to Learn more about Pandas visit this Pandas Tutorial.

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