Below is a sequence diagram illustrating the process of handling errors in Python: UserProgramUserRun programError occursPrint error message Conclusion In this article, we have discussed the different types of errors you may encounter in Python and how to print and handle them effectively. By under...
print('Handling run-time error:', err) Handling run-time error: int division or modulo by zero 1. 2. 3. 4. 5. 6. 7. 8. 9. 抛出异常 Python 使用 raise 语句抛出一个指定的异常。例如: >>> raise NameError('HiThere') Traceback (most recent call last): File "<stdin>", line 1,...
print('Handling run-time error:',err) Handling run-timeerror:intdivisionormodulo by zero try-finally 语句 try-finally 语句无论是否发生异常都将执行最后的代码。 以下实例中 finally 语句无论异常是否发生都会执行: 实例 try: runoob() exceptAssertionErroraserror: print(error) else: try: withopen('fi...
Exception as error: 这里指定的异常事件是 Exception 类,抓住了之后给其定义一个变量叫 error, 然后进入异常处理。 # error handling: 这里是抓住了异常事件之后做处理。 finally: 这是可有可无的,不论异常有没有出现被抓住,都会进入这个语法,一般是用来做数据清理,并且保证可以被执行的一段话。 Python的异常处理...
print("OS error: {0}".format(err)) exceptValueError: print("Could not convert data to an integer.") except: print("Unexpected error:",sys.exc_info()[0]) raise --- OSError 异常类型:操作系统错误 ValueError 异常类型:传入无效参数 ===执行结果如下:=== OS error: [Errno...
print('Handling run-time error:', err) ... Handling run-time error: division by zero 抛出异常 raise 语句允许程序员强制发生指定的异常 >>> raise NameError('HiThere') Traceback (most recent call last): File "<stdin>", line 1, in <module> NameError: HiThere raise 唯一的参数就是要抛出...
print("Unexpected error:", sys.exc_info()[0]) raise try/except...else try/except 语句还有一个可选的 else 子句,如果使用这个子句,那么必须放在所有的 except 子句之后。 else 子句将在 try 子句没有发生任何异常的时候执行。 以下实例在 try 语句中判断文件是否可以打开,如果打开文件时正常的没有发生异...
print(e.args[0]) traceback In larger, more complex scripts, it can be difficult to determine the precise location of an error.Python'ssysandtracebackmodules can be used together to isolate the exact location and cause of the error, identifying the cause of an error more accurately and savin...
It can also be used to print an error message and then re-raise the exception (allowing a caller to handle the exception as well): try-except的最后一个except语句块可以省略异常的名字,来作为一个通配符。使用这种异常块要非常的小心,因为这种方式很容易掩盖程序真实的错误!它也能够先打印错误消息,并引...
ExecuteError: # Get the tool error messages # msgs = arcpy.GetMessages(2) # Return tool error messages for use with a script tool # arcpy.AddError(msgs) # Print tool error messages for use in Python/PythonWin # print(msgs) except: # Get the traceback object # tb = sys.exc_info()...