【python】if __name__ == "__main__"

part1:

TemperatureConversion.py

def c2f(cel):
fal = cel * 1.8 + 32
return fal

def f2c(fah):
cel = (fah - 32) / 1.8
return cel

def test():
print("main函数")
print("0摄氏度 = %.2f华氏度" % c2f(0))
print("0华氏度 = %.2f摄氏度" % f2c(0))

test()

calc.py

import TemperatureConversion as tc

print("模块")
print("32摄氏度 = %.2f华氏度" % tc.c2f(32))
print("99华氏度 = %.2f摄氏度" % tc.f2c(99))

result:



improvement：if __name__ == "__main__"
part2:

TemperatureConversion.py

def c2f(cel):
fal = cel * 1.8 + 32
return fal

def f2c(fah):
cel = (fah - 32) / 1.8
return cel

def test():
print("main函数")
print("0摄氏度 = %.2f华氏度" % c2f(0))
print("0华氏度 = %.2f摄氏度" % f2c(0))

if __name__ == "__main__":
test()

calc.py

import TemperatureConversion as tc

print("模块")
print("32摄氏度 = %.2f华氏度" % tc.c2f(32))
print("99华氏度 = %.2f摄氏度" % tc.f2c(99))

result:



analysis:

1、cal.py，__name__ == "__main__"
2、TemperatureConversion.py，tc.__name__=="__TemperatureConversion__"
3、对应__name__的值选择是否执行（if __name__ == "__main__"）