文件及IO操作

1. 读取文件

# 读取文件
import os

# 绝对路径
# absolute_path = os.getcwd()
# file_name = absolute_path + '/test.txt'
# f = open(file_name, mode='r', encoding='utf-8')

# 相对路径
f = open('test.txt', mode='r', encoding='utf-8')
# content = f.read()  # 读取全部
# content = f.readline()  # 读取一行
content = f.readlines()  # 按行读取
print(content)

# 关闭
f.close()

2. 写文件

# 写文件
f = open('test.txt', mode='w', encoding='utf-8')
f.write('大家好\n')

write_content = ['孙笑川\n', '刘波\n']
f.writelines(write_content)
f.close()

f = open('test.txt', mode='r', encoding='utf-8')
read_content = f.read()
print(read_content)
f.close()

3. 追加写

# 追加写
f = open('test.txt', mode='a', encoding='utf-8')
f.write('你好\n')

content = ['带带大师兄\n', '药水哥\n']
f.writelines(content)
f.close()

4. with

# with open() as f 操作文件
with open('test.txt', mode='r', encoding='utf-8') as f:
    print(f.read())
print('使用with语法糖读取文件内容完成')