rotate string in python

1def rotate_string(s,d): 
2  
3    # slice string in two parts for left and right 
4    Lfirst = s[0 : d] 
5    Lsecond = s[d :] 
6    Rfirst = s[0 : len(s)-d] 
7    Rsecond = s[len(s)-d : ] 
8  
9    # now join two parts together 
10    print ("Left Rotation : ", (Lsecond + Lfirst) )
11    print ("Right Rotation : ", (Rsecond + Rfirst)) 
12  
13string = 'Studytonight'
14d=4
15rotate_string(string,d)