def is_Sublist(l, s): sub_set = False if s == []: sub_set = True elif s == l: sub_set = True elif len(s) > len(l): sub_set = False else: for i in range(len(l)): if l[i] == s[0]: n = 1 while (n < len(s)) and (l[i+n] == s[n]): n += 1 if n == len(s): sub_set = True return sub_set a = [2,4,3,5,7] b = [4,3] c = [3,7] print(is_Sublist(a, b)) print(is_Sublist(a, c))