# How to lowercase column names in Pandas dataframe in Python 
 # Create a simple dataframe
   
# importing pandas as pd
import pandas as pd
  
# creating a dataframe
df = pd.DataFrame({'A': ['John', 'bODAY', 'MinA', 'Peter', 'nicky'],
                  'B': ['masters', 'graduate', 'graduate',
                                   'Masters', 'Graduate'],
                  'C': [27, 23, 21, 23, 24]})
   
df