python计算寄送包裹重量的实现过程

weight=eval(input("请输入重量:"))
if weight<5.0:
    money=weight*0.5
else:
    money=5.0*0.5+(weight-5.0)*0.8
print("应付金额为:",money)

weight=eval(input("请输入重量:"))
if weight<5.0:
    money=weight*0.5
elif 5<weight<10:
    money=5.0*0.5+(weight-5.0)*0.8
elif 10<weight<20:
    money=6.5+(weight-10)*1.0
else:
    money=weight*1.2
print("应付金额为:",money)

weight=eval(input("输入包裹重量:"))
if weight<20:
if 10<=weight<20:
     money = 10 * 0.8 + (weight - 10) * 1
 
elif 5<=weight<10:
       money = 5 * 0.5 + (weight - 5) * 0.8
else:
       money=weight*0.5
    money=weight*1.2
print("应付金额为:",money)