终端计算器，完成加减乘除功能

import sys
def jisuanqi (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(jisuanqi(sys.argv[1],sys.argv[2],sys.argv[3]))

第二种：

import sys
num1 = int(sys.argv[1])
num2 = int(sys.argv[3])
if sys.argv[2] == '+':
    print(num1 + num2)
elif sys.argv[2] == '-':
    print(num1 - num2)
elif sys.argv[2] == '*':
    print(num1 * num2)
elif sys.argv[2] == '/':
    print(num1 / num2)