1 a = 1886
 2 # 取商和余数
 3 print(a.__divmod__(10))  
 4 
 5 # r=反转,想当于 10-1886
 6 print(a.__rsub__(10)) 
 7 
 8 # 取绝对值
 9 print(a.__abs__(), abs(a))  
10 
11 #商取整
12 print(a.__floordiv__(10), a // 10)