01-Python函数「南开大学」

# -*- coding: utf-8 -*-
# @Time    : 2023/1/27 19:06
# @Author  : AI悦创
# @FileName: hw01.py
# @Software: PyCharm
# @Blog    ：https://bornforthis.cn/
# 计算器✅
# 重复执行
# 判断退出
# 获取用户输入✅
# 类型转换✅

def calculator(num1, num2, operation):
    """
    :param num1: int
    :param num2: int
    :param operation:
    :return: int or str
    """
    if operation == "+":
        return num1 + num2
    elif operation == "-":
        return num1 - num2
    elif operation == "/":
        return num1 / num2
    elif operation == "*":
        return num1 * num2
    else:
        return "Operation Error......"


def str_to_int_or_float(target):
    if target.count(".") == 1:
        return float(target)
    else:
        return int(target)


def main():
    while True:
        print("""请输入计算数据，输入格式：num1,num2,运算符""")
        userinput = input(":>>>").split(",")
        if len(userinput) == 1 and userinput[0].lower() == 'q':
            break
        num1, num2, operation = userinput
        # result = calculator(int(num1), int(num2), operation)
        result = calculator(str_to_int_or_float(num1), str_to_int_or_float(num2), operation)
        print(result)


# num1, num2, operation
# if __name__ == '__main__':
#     main()
main()

In [1]: a, b, c = [1, 2, 3]

In [2]: a
Out[2]: 1

In [3]: b
Out[3]: 2

In [4]: c
Out[4]: 3

In [5]: lst = [1, 2, 3]

In [6]: a = lst[0]

In [7]: b = lst[1]

In [8]: c = lst[2]

In [9]: a
Out[9]: 1

In [10]: b
Out[10]: 2

In [11]: c
Out[11]: 3