import sys
def lt(a, b, c ):
if b == "+":
return int(a)+int(c)
elif b == "-":
return int(a)-int(c)
elif b == "*":
return int(a)*int(c)
elif b == "/":
return int(a)/int(c)
print(lt(sys.argv[1],sys.argv[2],sys.argv[-1]))
原文：https://www.cnblogs.com/lzw19951020/p/9356706.html