这必须是异常实例或异常类(从异常派生的类) try:raiseNameError("Hi there")# Raise ErrorexceptNameError:print("An exception") 参考: https://www.geeksforgeeks.org/python-exception-handling/ __EOF__
If an exception occurs during execution of the try clause, the rest of the clause is skipped. Then if its type matches the exception named after the except keyword, the except clause is executed, and then execution continues after the try statement. If an exception occurs which does not matc...
print('Handling run-time error:', err) Handling run-time error: int division or modulo 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() except AssertionError as error: print(error) else: try:...
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: ...
During handlingofthe above exception,another exception occurred:RuntimeErrorTraceback(most recent call last)<ipython-input-10-e950a6292482>in<module>2print(10/0)3except:--->4raiseRuntimeError("something is wrong")5RuntimeError:something is wrong 串...
is returned, the system does not execute the program. Python uses the try-except statement to implement exception handling. Execute the statement inside except when an exception occurs. Note that the exception type after except must be the same as the exception type given when the error is ...
ValueError: math domain error >>> 3. Handling ValueError Exception Here is a simple example to handle ValueError exception using try-except block. import math x = int(input('Please enter a positive number:\n')) try: print(f'Square Root of {x} is {math.sqrt(x)}') ...
在程序中可以通过创建新的异常类型来命名自己的异常(Python 类的内容请参见类)。异常类通常应该直接或间接的从Exception类派生,例如: >>>classMyError(Exception):...def__init__(self,value):...self.value=value...def__str__(self):...returnrepr(self.value)...>>>try:...raiseMyError(2*2).....
上面展示了三种exception的类型:ZeroDivisionError、NameError、TypeError ,它们都是内置异常的名称。标准异常的名字是内建的标识符 (但并不是关键字)。 二、处理异常(try…except…) 我们可以使用 try…except… 语句来处理异常。try 语句块中是要执行的语句,except 语句块中是异常处理语句。一个 try 语句可以有多条...
def main(): try: x = int('str') y = 5 / 0 except ValueError: print('Caught a ValueError Exception') except ZeroDivisionError: print('Cannot divided by 0') except: print('Caught a General Exception') else: print('Good - No Error') finally: print('Run this no matter what happened'...