python - 参数检测isinstance

参数检测isinstance:

def add(x, y):
    if isinstance(x, (int, float)) and isinstance(y, (int, float)):
    # x,y只能是int或float
        return x + y
    else:
        print('Error:')

res = add(2.5,2)
print(res)

输出:

4.5

将输入参数变为字符串型

在这里插入图片描述

练习
编写函数,计算字符串匹配的准确率(字母相同的个数占第一句的多少百分比)
1.只能是字符串型
2.第一句不能比第二句短

def Rate(orgin,userInput):
    if not (isinstance(orgin,str) and isinstance(userInput,str)):
        print('The tow parameters must be string')
        return
    	# 返回空
    if len(orgin) < len(userInput):
        print('Sorry.')
        return
    right = 0
    for orgin_char,user_char in zip(orgin,userInput):
        if orgin_char == user_char:
            right += 1
    return right/len(orgin)

a = 'have a nice day'
b = 'Have b aaaa DAy'
print(Rate(a,b))

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转载自blog.csdn.net/weixin_43067754/article/details/84788640