change column names in a panda dataframe in python code example

Example 1: rename column name pandas dataframe

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

Example 2: change name of column pandas

#df.rename() will only return a new df with the new headers
#df = df.rename() will change the heders of the current dataframe 
df = df.rename(columns={"old_col1": "new_col1", "old_col2": "new_col2"})

Example 3: rename dataframe index column pandas

df.index.names = ['new_name']

Example 4: change column names pandas

df.columns = ['A','B']