Change Index Name of pandas DataFrame in Python (Example Code)

import pandas as pd                                # Load pandas

import pandas as pd # Load pandas

my_df = pd.DataFrame({'A':[1, 2, 9, 5, 1, 2, 5],  # Construct example DataFrame in Python
                      'B':[5, 6, 6, 7, 1, 9, 2],
                      'C':[8, 2, 5, 6, 8, 2, 1],
                      'D':['a', 'b', 'c', 'd', 'e', 'f', 'g']})
print(my_df)                                      # Display example DataFrame in console
#    A  B  C  D
# 0  1  5  8  a
# 1  2  6  2  b
# 2  9  6  5  c
# 3  5  7  6  d
# 4  1  1  8  e
# 5  2  9  2  f
# 6  5  2  1  g

my_df = pd.DataFrame({'A':[1, 2, 9, 5, 1, 2, 5], # Construct example DataFrame in Python 'B':[5, 6, 6, 7, 1, 9, 2], 'C':[8, 2, 5, 6, 8, 2, 1], 'D':['a', 'b', 'c', 'd', 'e', 'f', 'g']}) print(my_df) # Display example DataFrame in console # A B C D # 0 1 5 8 a # 1 2 6 2 b # 2 9 6 5 c # 3 5 7 6 d # 4 1 1 8 e # 5 2 9 2 f # 6 5 2 1 g

my_df_new = my_df.set_index('D')                  # Column as index
print(my_df_new)                                  # Display new pandas DataFrame
#    A  B  C
# D         
# a  1  5  8
# b  2  6  2
# c  9  6  5
# d  5  7  6
# e  1  1  8
# f  2  9  2
# g  5  2  1

my_df_new = my_df.set_index('D') # Column as index print(my_df_new) # Display new pandas DataFrame # A B C # D # a 1 5 8 # b 2 6 2 # c 9 6 5 # d 5 7 6 # e 1 1 8 # f 2 9 2 # g 5 2 1