PYTHON

rename columns pandas

df.rename(columns={'oldName1': 'newName1',
                   'oldName2': 'newName2'},
          inplace=True, errors='raise')
# Make sure you set inplace to True if you want the change
# to be applied to the dataframe

rename df column

import pandas as pd
data = pd.read_csv(file)
data.rename(columns={'original':'new_name'}, inplace=True)

pandas rename column

df.rename(columns={"old_col1": "new_col1", "old_col2": "new_col2"}, inplace=True)

rename column name pandas dataframe

df.rename(columns={"old_col1": "new_col1", "old_col2": "new_col2"})

rename column in dataframe

df.rename({"current": "updated"}, axis=1, inplace=True)
print(df.dtypes)

pandas dataframe column rename

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

pandas dataframe rename column

df = df.rename(columns={'oldName1': 'newName1', 'oldName2': 'newName2'})
# Or rename the existing DataFrame (rather than creating a copy) 
df.rename(columns={'oldName1': 'newName1', 'oldName2': 'newName2'}, inplace=True)

pandas rename column

df.rename({'current':'updated'},axis = 1, inplace = True)

Renaming Column Name Dataframe

df = df.rename(columns={'oldName1': 'newName1', 'oldName2': 'newName2'})

rename columns in dataframe

df.rename(columns = {'old_col1':'new_col1', 'old_col2':'new_col2'}, inplace = True)

dataframe rename column

# Define df
df = pd.DataFrame({"A": [1, 2, 3], "B": [4, 5, 6]})

# Option 1
df = df.rename({"A": "a", "B": "c"}, axis=1)
# or
df.rename({"A": "a", "B": "c"}, axis=1, inplace=True)

# Option 2
df = df.rename(columns={"A": "a", "B": "c"})
# or
df.rename(columns={"A": "a", "B": "c"}, inplace=True)

# Result
>>> df
   a  c
0  1  4
1  2  5
2  3  6

rename column pandas

df_new = df.rename(columns={'A': 'a'}, index={'ONE': 'one'})
print(df_new)
#         a   B   C
# one    11  12  13
# TWO    21  22  23
# THREE  31  32  33

print(df)
#         A   B   C
# ONE    11  12  13
# TWO    21  22  23
# THREE  31  32  33

df rename columns

df.rename(columns = {'col1':'new_name', 'col2':'newcol2',
                              'col3':'newcol3'}, inplace = True)

rename column pandas

# Simple use case for pd.rename()

'''
old parameter = 'Data.Population'
new parameter = 'Population'	
df.rename(columns={'old parameter': 'new parameter'}, inplace = True)
inplace = True : means to change object in real time
'''
# view below for visual aids
df.rename(columns={'Data.Population': 'Population'}, inplace = True)

# old columns
|'Data.Population'|                
|_________________|
|   0             |
|_________________|

# new output:
# new rename column
|'Population' |
|_____________|
|   0         |
|_____________|

rename column pandas

>>> df.rename({1: 2, 2: 4}, axis='index')
   A  B
0  1  4
2  2  5
4  3  6

how to rename columns in pandas dataframe

energy = energy.rename(columns={2: 'Country', 3: 'Energy Supply' , 4:'Energy Supply per Capita',5:'% Renewable'})

rename column pandas

>>> df.rename(index={0: "x", 1: "y", 2: "z"})
   A  B
x  1  4
y  2  5
z  3  6

rename column pandas

>>> df.rename(columns={"A": "a", "B": "b", "C": "c"}, errors="raise")
Traceback (most recent call last):
KeyError: ['C'] not found in axis

How to rename columns in Pandas DataFrame

# import pandas library
import pandas as pd

# create pandas DataFrame
df = pd.DataFrame({'team': ['India', 'South Africa', 'New Zealand', 'England'],
                   'points': ['10', '8', '3', '5'],
                   'runrate': ['0.5', '1.4', '2', '-0.6'],
                   'wins': ['5', '4', '2', '2']})

# print the column names of DataFrame
print(list(df))

# rename the column names of DataFrame
df.rename(columns={'points': 'total_points',
          'runrate': 'run_rate'}, inplace=True)

# print the new column names of DataFrame
print(list(df))

rename colums dataframe pandas

df.columns = ['new_col1', 'new_col2', 'new_col3', 'new_col4']

rename column pandas

>>> df.rename(str.lower, axis='columns')
   a  b
0  1  4
1  2  5
2  3  6

renamecolumns pandas

df.columns = ['V', 'W', 'X', 'Y', 'Z']
df

   V  W  X  Y  Z
0  x  x  x  x  x
1  x  x  x  x  x
2  x  x  x  x  x

rename column in dataframe

DataFrame.rename() method

rename data columns pandas

data.columns = ['New_column_name', 'New_column_name2']

renamecolumns pandas

>>> df.columns = ['a', 'b']
>>> df
   a   b
0  1  10
1  2  20