chANGING COLUMNS NAME IN DF code example

Example 1: change specific column name pandas

df_new = df.rename(columns={'A': 'a'}) #change a from A

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"})