Print python datatype Inbuilt method

#! /usr/bin/python3

def data(d):
    for i in dir(d):
        if not i.startswith('_'):
            print(i)    
    else:
      print()
      
#print('Integer Method:')
#data(int)
print('String Method:')
data(str)
print('List Method:')
data(list)
print('Set Method:')
data(set)
print('Dictionary Method:')
data(dict)