a = [[1,0,1,2,1,1,1,3111111], [31,1,4,51,1,1,1], [1,1,6,7,8]] print min(a, key=len) # [1, 1, 6, 7, 8] print len(min(a, key=len)) # 5 print min(map(len, a)) # 5
min(list)