异常处理迷宫：Python常见异常及其优雅处理实例

原创末蓝、 2025-02-26 05:09 29阅读 0赞

在编程中，我们不可避免地会遇到各种异常情况。下面我将列出一些常见的Python异常，并提供优雅的处理实例。

1. **ZeroDivisionError**：当除数为零时抛出。

```python
def safe_division(num, divisor):
    if divisor == 0:
        return "Error: Division by zero is not allowed."
    else:
        return num / divisor

try:
    result = safe_division(10, 0)
except ZeroDivisionError as e:
    print(e)  # Output: Error: Division by zero is not allowed.
```

2. ****TypeError**: 对象不能用方法`method_name`处理。

```python
def safe_string_method(some_str):
    try:
        result = some_str.upper()
    except TypeError as te:
        print(te)  # Output: 'str' object has no attribute 'upper'
    return result

some_invalid_text = "Invalid text with non-string method"
try:
    valid_output = safe_string_method(some_invalid_text)
except TypeError as e:
    print(e)  # Output: 'str' object has no attribute 'upper'
```

3. ****AttributeError**: 对象的属性或方法`method_name`不存在。

```python
class MyClass:
    def __init__(self):
        self.some_attribute = "Initial value"

def custom_method(self, param):
        return param * 2

try:
    obj = MyClass()
    invalid_method_output = obj.custom_method("Invalid input")
except AttributeError as e:
    print(e)  # Output: 'MyClass' object has no attribute 'custom_method'
```

以上就是一些常见的Python异常及其优雅处理实例。在实际编程中，我们应该学会预见和处理各种可能出现的异常情况。