azure - convert string into numeric data in the dataframe using python -


if have field in dataframe

a12 a13 a13 a12 a14

we need convert string into

a12   1 a13   2 a13   2 a12   1 a14   3

try this:

arr=dataframe['old_col'].unique() dataframe['new_col']=dataframe['old_col'].apply(lambda x: arr.index(x))

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