如何获取并理解科学计算器的源代码?

import math
def add(x, y):
    return x + y
def subtract(x, y):
    return x  y
def multiply(x, y):
    return x * y
def divide(x, y):
    if y == 0:
        raise ValueError("除数不能为0")
    return x / y
def power(x, y):
    return x ** y
def sqrt(x):
    if x < 0:
        raise ValueError("负数没有平方根")
    return math.sqrt(x)
def log(x, base=math.e):
    if x <= 0:
        raise ValueError("对数的底数必须大于0")
    return math.log(x, base)
def sin(x):
    return math.sin(x)
def cos(x):
    return math.cos(x)
def tan(x):
    return math.tan(x)
def main():
    while True:
        print("请选择操作：")
        print("1.加法")
        print("2.减法")
        print("3.乘法")
        print("4.除法")
        print("5.幂运算")
        print("6.平方根")
        print("7.对数")
        print("8.正弦")
        print("9.余弦")
        print("10.正切")
        print("0.退出")
        choice = input("请输入操作序号：")
        if choice == '0':
            break
        if choice in ('1', '2', '3', '4', '5'):
            num1 = float(input("请输入第一个数字："))
            num2 = float(input("请输入第二个数字："))
            if choice == '1':
                print("结果：", add(num1, num2))
            elif choice == '2':
                print("结果：", subtract(num1, num2))
            elif choice == '3':
                print("结果：", multiply(num1, num2))
            elif choice == '4':
                try:
                    print("结果：", divide(num1, num2))
                except ValueError as e:
                    print(e)
            elif choice == '5':
                print("结果：", power(num1, num2))
        elif choice in ('6', '7', '8', '9', '10'):
            num = float(input("请输入一个数字："))
            if choice == '6':
                try:
                    print("结果：", sqrt(num))
                except ValueError as e:
                    print(e)
            elif choice == '7':
                base = float(input("请输入对数的底数（默认为自然对数）：")) or math.e
                try:
                    print("结果：", log(num, base))
                except ValueError as e:
                    print(e)
            elif choice == '8':
                print("结果：", sin(num))
            elif choice == '9':
                print("结果：", cos(num))
            elif choice == '10':
                try:
                    print("结果：", tan(num))
                except ValueError as e:
                    print(e)
        else:
            print("无效的输入，请重新输入")
if __name__ == "__main__":
    main()

以上内容就是解答有关“科学计算器源码”的详细内容了，我相信这篇文章可以为您解决一些疑惑，有任何问题欢迎留言反馈，谢谢阅读。