python文件读写操作基础练习题

以下是Python文件读写操作基础练习题的答案：

1. 读取文件内容并打印

with open('file.txt', 'r') as f:
    content = f.read()
    print(content)

2. 逐行读取文件内容并打印

with open('file.txt', 'r') as f:
    for line in f:
        print(line.strip())

3. 写入文件

with open('file.txt', 'w') as f:
    f.write('Hello, world!')

4. 追加内容到文件

with open('file.txt', 'a') as f:
    f.write('\nHello again!')

5. 读取CSV文件并打印每行内容

import csv

with open('file.csv', mode='r', encoding='utf-8') as f:
    reader = csv.reader(f)
    for row in reader:
        print(row)

6. 以字典格式读取CSV文件并打印每个人的名字和电子邮件地址

import csv

with open('user.csv', mode='r', encoding='utf-8') as f:
    users = csv.DictReader(f)
    for user in users:
        print(user['name'], user['email'])