Python文件操作基础及异常处理

file_object = open(file_path, mode)

file = open('example.txt', 'r')  # 打开文件用于读取
print(file.read())               # 打印文件内容
file.close()                     # 关闭文件

with open('example.txt', 'r') as file:
    content = file.read()  # 读取整个文件内容
    print(content)  # 打印文件内容

with open('example.txt', 'w') as file:
    file.write('Hello, Python!\n')  # 写入一行文本

with open('example.txt', 'a') as file:
    file.write('This is a new line.\n')  # 在文件末尾追加一行

with open('example.txt', 'r') as file:
    for line in file:
        print(line.strip())  # 去除换行符并打印每一行

with open('example.txt', 'r') as file:
    while True:
        line = file.readline()  # 读取一行
        if not line:  # 如果是空字符串，说明文件结束
            break
        print(line.strip())  # 打印当前行内容

import os
path = os.path.expanduser("~/xxx.txt")
with open(path, 'r') as file:
    ......

try:
    with open('nonexistent.txt', 'r') as file:
        content = file.read()
        print(content)
except FileNotFoundError:
    print("错误：文件不存在。请检查路径。")
except PermissionError:
    print("错误：没有权限读取该文件。")
except Exception as e:
    print(f"发生了其他错误：{e}")

with open('image.jpg', 'rb') as file:
    data = file.read()
    print(data[:10])  # 打印前10个字节的数据

with open('copy.jpg', 'wb') as file:
    with open('image.jpg', 'rb') as src:
        file.write(src.read())  # 复制图片

with open(r'C:\用户\文档\文件.txt', 'r') as file:
    print(file.read())

try:
    with open('example.txt', 'r') as file:
        print("文件内容：")
        print(file.read())
except FileNotFoundError:
    print("文件不存在，请检查路径。")
except PermissionError:
    print("没有权限访问该文件。")
except Exception as e:
    print(f"发生了未知错误：{e}")