关于python中round使用

 #round 小数部位为5，整数位为偶数，直接取偶数部位；整数位为奇数，则奇数+1

print(round(0.5))#0
print(round(1.5))#2
print(round(2.5))#2
print(round(3.5))#4
print(round(4.5))#4
print(round(9.5))#10
print(round(10.5))#10
print(round(11.5))#12
print(round(12.5))#12