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Python functions to reorganise a data frame.
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Here is a Python function to reorganise a data frame

import pandas as pd

def reorganise_dataframe(df, column_name, index_name):
        """
        Reorganise a data frame.
        :param df: data frame
        :param column_name: column name
        :param index_name: index name
        :return:
        """
        df.rename(columns={column_name: index_name}, inplace=True)
        return df

# Enter the data
df = pd.DataFrame({"a": [1, 2, 3, 4, 5], "b": [1, 2, 3, 4, 5]})

# Calling the function
df = reorganise_dataframe(df, "a", "b")

#Remember to inspect code for bugs.