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What is the method for obtaining the column number(s) of an entry/entries in Pandas?

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• python

asked 2023-06-19 19:06:41 +0000

qstack
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answered 2023-06-19 19:16:02 +0000

lakamha
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To obtain the column number(s) of an entry/entries in Pandas, you can use the .get_loc() method. For example:

import pandas as pd # create a sample dataframe df = pd.DataFrame({ 'A': [1, 2, 3], 'B': [4, 5, 6], 'C': [7, 8, 9] }) # get the column number of column 'B' col_num_B = df.columns.get_loc('B') # get the column numbers of columns 'B' and 'C' col_nums_B_C = [df.columns.get_loc(c) for c in ['B', 'C']] 

In this example, col_num_B would be 1 (since column 'B' is the second column), and col_nums_B_C would be [1, 2] (since columns 'B' and 'C' are the second and third columns, respectively).

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