在Python中处理文件：读写错误案例

原创蔚落 2025-01-19 08:21 53阅读 0赞

在Python中处理文件时，可能会遇到各种读写错误。以下是一些常见的错误案例：

文件不存在错误：

file = "non_existent_file.txt"
try:
 with open(file, 'r') as f:
     print(f.read())
except FileNotFoundError:
 print("File not found.")

无权限错误：
```python
file = “./secret_file.txt”
if not os.path.exists(file):
raise Exception(“Secret file does not exist.”)

模拟没有写入文件的权限

def write_with_no_permission(file, content):
with open(file, ‘w’) as f:
if isinstance(content, str):
f.write(content)
else:
print(“Error: Content must be a string.”)
return

file_content = “This is a secret message.”
try:
write_with_no_permission(file, file_content)
except PermissionError:
print(“Permission error occurred when trying to write to the file.”)

3. 文件正在使用错误（对于写操作）：
```python
def write_to_running_file(file_path, content):
    try:
        with open(file_path, 'w')) as f:
            f.write(content)
            print(f"Content '{content}' written successfully to {file_path}."))
    except PermissionError:
        print("Permission error occurred when trying to write to the file.")
running_file_path = "./running_file.txt"
content_to_write = "This content will be overwritten."
write_to_running_file(running_file_path, content_to_write)