print(f"Caught an exception: {ve}") asyncio.run(main())6.1.2 使用协程与异步库处理异常 许多异步库(如aiohttp、aioredis等)遵循类似的异常处理模式。例如 ,在aiohttp中处理HTTP请求异常: import aiohttp async def fetch_url(url): async with aiohttp.ClientSession() as session: try: async with session...
class CustomError(Exception): pass def some_function(value): if value < 0: raise CustomError("Value cannot be negative") # ... 其他代码 ... try: some_function(-1) except CustomError as e: print(f"Caught an exception: {e}") ...
report_callback_exception,您可以编写自己的方法来做任何您想做的事情。 例如: import tkinterastk def handle_exception(exception, value, traceback): print("Caught exception:", exception) def raise_error(): raise Exception("Sad trombone!") root=tk.Tk() # setup custom exception handling root.report...
步骤一:引发一个异常 # 引发一个异常defraise_exception():raiseException("This is an example exception") 1. 2. 3. 步骤二:捕获异常 try:# 调用引发异常的函数raise_exception()exceptExceptionase:# 捕获异常并打印print("Caught an exception:",e) 1. 2. 3. 4. 5. 6. 步骤三:输出异常信息 import...
print("除数不能为零!") 除了使用try-except语句来处理异常,还可以使用其他相关的结构和关键字,如try-except-else、try-except-finally等,来更灵活地处理异常情况。 异常的分类2 在Python中,异常可以进一步分为内置异常(Built-in Exceptions)和自定义异常(Custom Exceptions)。
print(f"Caught an exception: {e}") except AnotherSpecificException: # 处理另一种特定异常 print("Caught another specific exception") except Exceptionase: # 处理所有其他异常 print(f"An error occurred: {e}")else: # 如果没有异常,执行这个代码块 ...
classCustomException(Exception):passdefdivide(a,b):try:result=a/bexceptZeroDivisionErrorase:raiseCustomException("Division by zero")fromereturnresultdefprocess_data(data):try:result=divide(10,data)exceptCustomExceptionase:print("Caught exception:",e)returnprint("Result:",result)process_data(5)process...
def divide_numbers(a, b): try: return a / b except ZeroDivisionError as e: raise ValueError(`Invalid input for division`) from e try: divide_numbers(10, 0) except ValueError as e: print(f`Caught exception: {e}`) print(f`Original cause: {e.__cause__}`) 在这个例子中,ValueError 被...
import asyncio async def my_coroutine(): try: # 异步操作 await asyncio.sleep(1) raise ValueError("An error occurred") except ValueError as e: print(f"Caught an exception: {e}") async def main(): task = asyncio.ensure_future(my_coroutine()) await asyncio.gather(task) if __name__ =...
print(line) The main part of the code we are interested in here is lines 12 to 15. Here We have caught the exception Then we took out theStackTracewith the help of theexc_info() method of thesysmodule Then we printed out one line at a time using a for-loop. ...