PYTHON

pandas change column name from a dictionary

df = pd.DataFrame({"A": [1, 2, 3], "B": [4, 5, 6]})
cols= {"A": "a", "B": "c"}
>>> df.rename(columns=cols)
   a  c
0  1  4
1  2  5
2  3  6

pandas rename column values dictionary

df['col1'].map(di)       # note: if the dictionary does not exhaustively map all
                         # entries then non-matched entries are changed to NaNs

pandas rename column by dictionary

# import pandas
import pandas as pd
 
# create data frame
df = pd.DataFrame({'First Name': ["Mukul", "Rohan", "Mayank",
                                  "Vedansh", "Krishna"],
                    
                   'Location': ["Saharanpur", "Rampur", "Agra",
                                "Saharanpur", "Noida"],
                    
                   'Pay': [56000.0, 55000.0, 61000.0, 45000.0, 62000.0]})
 
# print original data frame
display(df)
 
# create a dictionary
# key = old name
# value = new name
dict = {'First Name': 'Name',
        'Location': 'City',
        'Pay': 'Salary'}
 
# call rename () method
df.rename(columns=dict,
          inplace=True)
 
# print Data frame after rename columns
display(df)

pandas rename column values dictionary

df['col1'].map(di).fillna(df['col1'])