2021-02-25 函数基础的作业题

最新推荐文章于 2024-01-22 20:28:06 发布

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博客包含多个编程练习题，有计算字符串中字符a的次数、判断数值大小、比较两数大小、将元素写入txt文件、字符串替换，还有读取用户信息构造字典并进行加密密码比对实现登录验证等内容。

练习题一、计算字符串中字符a的次数，并通过retrun返回

def is_str_a(number):
    """计算字符串中字符a的次数，并通过retrun返回"""
    count = 0
    for char in number:
        if char == 'a':
            count += 1
    return count

result = is_str_a('sdfgssaafhsdjfasghsjdfha')
print('字符串内出现a的次数有{}次'.format(result))

练习题二、判断数值大小是否大于5


def is_str_a(number):
    """判断数值大小是否大于5"""
    number = int(number)
    if number > int(5):
        return True
    else:
        return False

result = is_str_a(3)
print(result)

联系题三、判断两个数值的大小，返回大的那个

def is_str_a(x,y):
    """判断两个数值的大小，返回大的那个"""
    if x > y:
        return x
    elif x == y:
        return x
    else:
        return y

result = is_str_a(4,5)
print(result)

练习题四、函数接受四个元素，并将他写入到一个文件txt内

def write_file(name,gender,age,degree):
    ''' 函数接受四个元素，并将他写入到一个文件txt内'''
    data_list = [name,gender,age,degree]
    data = '*'.join(data_list)
    with open('student_msg,txt',mode='a',encoding='utf-8') as file_object:
        file_object.write(data)

write_file('菲菲','女','18','本科')

练习题五、代码实现字符串替换

import os
### 代码实现字符串替换
def select_content(file_path,key):
    if not os.path.exists(file_path):
        return
    data_list = []
    with open(file_path,mode='r',encoding='utf-8') as file_object:
        for line in file_object:
            if key in line:
                data_list.append(line)
    return data_list

result = select_content('files/xxx/txt','牛呀')
if result == None:
    print('文件不存在')
else:
    print(result)



def change_string(origin):
    data_list = ['鸿蒙','huawei','华为']
    for item in data_list:
        origin = origin.replace(item,'**')
    return origin
text = input('输入内容：')
result = change_string(text)
print(result)

练习题六、代码实现读取用户信息并构造为字典，用户登录时对加密密码比对，正确就登录，否则失败

import hashlib
from openpyxl import load_workbook
#### 代码实现读取用户信息并构造为字典，用户登录时对加密密码比对，正确就登录，否则失败
def get_user_dict():
    user_dict = {}
    wb = load_workbo
    
    ok('files/user.xlsx')
    sheet = wb.worksheets[0]
    for row in sheet.rows:
        user_dict[row[1].value] = row[2].value
    return user_dict

def encrypy(origin):
    origin_bytes = origin.encode('utf-8')
    md5_object = hashlib.md5()
    md5_object.update(origin_bytes)
    return md5_object.hexdigest()

user = input('输入用户名：')
pwd = input('input your passwd：')
encrypy_password = encrypy(pwd)
user_dict = get_user_dict()
db_password = user_dict.get(user)
if encrypy_password == db_password:
    print('登录成功')
else:
    print('登录失败')