代码清单5-3 使用raw_input()转换温度

print "This program converts Fahrenheit to Celsius"
print "Type in a temperature in Fahrenheir:",
fahrenheir=float(raw_input())#使用float(raw_input())从用户得到温度（华氏）
celsius=(fahrenheir-32)*5.0/9
print "That is",celsius,"degrees Celsius"

>>> ================================ RESTART ================================
>>>
This program converts Fahrenheit to Celsius
Type in a temperature in Fahrenheir: 89
That is 31.6666666667 degrees Celsius
>>>