1

2

file = open("user.txt","r+")

print(file,type(file))

1

2

file = open("user.txt","w+")

print(file,type(file))

1

file.close()

1

2

3

4

file = open("user.txt","w+")

print(file,type(file))

file.write("hello\n")

file.close()

1

print(file.readlines())

1

2

3

4

5

6

7

8

9

10

stu = {'name':'lily','pwd':'123456'}

stu1 = {'name':'sam','pwd':'123123'}

#字典列表

stu_list = [stu,stu1]

#写入操作

with open("user.txt",mode='a+') as file:

    for item in stu_list:

        print(item)

        file.write(item['name']+" "+item['pwd']+"\n")

1

2

3

4

5

6

#读取操作

with open("user.txt",mode='r+') as file:

    lines = file.readlines()

    for line in lines:

        line = line.strip() #字符串两端的空格去掉

        print(line)

1

2

3

4

5

6

7

#读取操作

with open("user.txt",mode='r+') as file:

    lines = file.readlines()

    for line in lines:

        #字符串分割 空格分割出用户名和密码

        name , pwd = line.split(" ")

        print(name,pwd)

1

2

3

4

5

6

7

8

9

user_list = []

#读取操作

with open("user.txt",mode='r+') as file:

    lines = file.readlines()

    for line in lines:

        line = line.strip() #字符串两端空格去除 去除\n

        name,pwd= line.split(" ") #用空格分割

        user_list.append({'name':name,'pwd':pwd})

    print(user_list)

1

2

3

4

5

6

7

8

user_list = []

#读取操作

with open("user.txt",mode='r+') as file:

    lines = file.readlines()

    for line in lines:

        name,pwd = line.strip().split(" ")

        user_list.append({'name':name,'pwd':pwd})

    print(user_list)

1

2

3

4

5

# 写入操作 封装

def write_file(filename,stu_list):

    with open(filename,mode='a+') as file:

        for item in stu_list:

            file.write(item['name'] + " " + item['pwd'] + "\n")

1

2

3

4

5

6

7

8

9

#读取操作 函数封装

def read_file(filename):

    user_list = []

    with open(filename,mode='r+') as file:

     lines = file.readlines()

    for line in lines:

        name,pwd = line.strip().split(" ")

        user_list.append({'name':name,'pwd':pwd})

    return user_list