Python初学者基础问题

这个代码就是一个摄氏度和华摄氏度相互转换的代码，代码没问题，如何将摄氏度和华摄氏度转换部分分别定义为两个函数，来运行，麻烦看一下，给一个修改后的代码，谢谢

print("Press1：Fahrenheit→centigrade")
print("Press2：centigrade→Fahrenheit")

temp=input("Please enter the function you want to select：")
guess=int(temp)

if guess==1 :
    temp=input("Please enter the Fahrenheit to be converted:")
    F=int(temp)
    C=(F-32)/1.8
    print("Fahrenheit："+str(F)+"F = centigrade："+str(C)+"℃")
elif guess==2 :
    temp=input("Please enter the centigrade to be converted:")
    C=int(temp)
    F=C*1.8+32
    print("centigrade："+str(C)+"℃ = Fahrenheit："+str(F)+"F")
else :
     print("Please check your input！")



print("Press1：Fahrenheit→centigrade")
print("Press2：centigrade→Fahrenheit")

temp = input("Please enter the function you want to select：")
guess = int(temp)


def convertFah_Centi(F):
    C = (F - 32) / 1.8
    print("Fahrenheit：" + str(F) + "F = centigrade：" + str(C) + "℃")


def convertCenti_Fah(C):
    F = C * 1.8 + 32
    print("centigrade：" + str(C) + "℃ = Fahrenheit：" + str(F) + "F")


if guess == 1:
    temp = input("Please enter the Fahrenheit to be converted:")
    F = int(temp)
    # C = (F - 32) / 1.8
    # print("Fahrenheit：" + str(F) + "F = centigrade：" + str(C) + "℃")
    convertFah_Centi(F)
elif guess == 2:
    temp = input("Please enter the centigrade to be converted:")
    C = int(temp)
    # F = C * 1.8 + 32
    # print("centigrade：" + str(C) + "℃ = Fahrenheit：" + str(F) + "F")
    convertCenti_Fah(C)
else:
    print("Please check your input！")