Convert columns from multiple dataframes to boolean

Question

I am trying to convert columns from multiple dataframes to boolean. What I have written to convert them is the following:

for i in range(0,4):
        df[i][['Col1','Col2','Col3','Col4']].astype('bool')

However it does not convert anything. Not all the columns from the dataframes need to be converted to boolean, so I have selected above only those ones that need to be converted. When I print df[1].dtypes (but I get the same results also from the other dataframes), all the columns above are objects, not boolean.

Could you please tell me where the error is in my code?

tmrlvi · Accepted Answer · 2020-05-16 22:16:29Z

1

Note that .astype returns a new object, and does not do the change in place. In order to perform the change, run:

for i in range(0,4):
    df[i][['Col1','Col2','Col3','Col4']] = df[i][['Col1','Col2','Col3','Col4']].astype('bool')

answered May 16, 2020 at 22:16

tmrlvi

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