一文带你掌握Python中文件I/O的使用技巧

# 打开一个文本文件以供读取
with open('example.txt', 'r') as file:
    data = file.read()
    print(data)

# 打开一个文本文件以供写入
with open('new_file.txt', 'w') as file:
    file.write('Hello, World!')

# 打开一个二进制文件以供读取
with open('image.jpg', 'rb') as file:
    image_data = file.read()

# 使用readline()逐行读取文件
with open('example.txt', 'r') as file:
    while True:
        line = file.readline()
        if not line:
            break
        print(line.strip())  # 去除行末的换行符

# 使用迭代文件对象逐行读取
with open('example.txt', 'r') as file:
    for line in file:
        print(line.strip())

# 写入文本到文件
with open('new_file.txt', 'w') as file:
    file.write('Line 1\n')
    file.write('Line 2\n')

# 写入多行文本到文件
lines = ['Line 1\n', 'Line 2\n', 'Line 3\n']
with open('new_file.txt', 'w') as file:
    file.writelines(lines)

import csv

with open('data.csv', 'r') as file:
    csv_reader = csv.reader(file)
    for row in csv_reader:
        print(row)

# 使用上下文管理器来读取文件
with open('example.txt', 'r') as file:
    data = file.read()
    print(data)  # 在此块中，文件已自动关闭

# 使用上下文管理器来写入文件
with open('new_file.txt', 'w') as file:
    file.write('Hello, World!')  # 在此块中，文件已自动关闭

try:
    with open('non_existent_file.txt', 'r') as file:
        data = file.read()
        print(data)
except FileNotFoundError:
    print("文件不存在")

with open('example.txt', 'r') as file:
    file.seek(0)  # 将文件指针移动到文件开头
    data = file.read()
    print(data)

import os

# 创建文件夹
os.mkdir('my_folder')

# 删除文件
os.remove('file_to_delete.txt')

# 重命名文件
os.rename('old_file.txt', 'new_file.txt')

# 获取文件列表
file_list = os.listdir('.')

import shutil

# 复制文件
shutil.copy('source_file.txt', 'destination_file.txt')

# 移动文件
shutil.move('source_file.txt', 'new_location/destination_file.txt')

# 删除文件夹及其内容
shutil.rmtree('folder_to_delete')