Python中异常处理：常见错误捕获示例-向日葵屋

Python中异常处理：常见错误捕获示例

原创 Myth丶恋晨 2025-02-20 06:33 34阅读 0赞

在Python编程中，异常处理是一种机制，用于在程序执行过程中遇到错误时进行适当的处理。以下是一些常见的错误捕获示例：

使用try/except块捕捉特定错误：
```python
def divide(a, b):
try:
```
 return a / b
```
except ZeroDivisionError:
```
 print("Can't divide by zero!")
 return None
```

result = divide(10, 2)
print(result) # Output: 5.0

2. **使用except所有错误**：
```python
def perform_operation(a, b):
    try:
        result = a + b
        print("Operation performed successfully.")
        return result
    except Exception as e:
        print("An error occurred:", str(e)))
        return None
result = perform_operation(5, "2")
print(result)  # Output: An error occurred: can't convert 'str' to 'int'

使用finally块确保某项操作始终执行：
```python
def write_to_file(file_name, content):
try:

 with open(file_name, 'w') as file:
     file.write(content)
     print(f"Content written to '{file_name}' successfully.")
 return True

except Exception as e:

 print("An error occurred:", str(e)))
 finally:
     print("File operation cleanup performed.")
 return False

result = write_to_file(‘test.txt’, “Hello, World!”)
print(result) # Output: Content written to ‘test.txt’ successfully.
```
通过这些示例，你可以理解如何在Python中使用异常处理来捕获和处理错误。