class MyClass: def do_something(self): raise NotImplementedError("这个方法还没有实现") my_obj = MyClass() my_obj.do_something() 12 RecursionError:递归错误,当递归调用过深导致最大递归深度限制被超过时发生。 # 无限递归def recursive_function(): recursive_function()recursive_function() 我的一些其...
二、异常报错Raise使用 使用raise抛出异常 当程序出现错误,python会自动引发异常,也可以通过raise显示地引发异常。一旦执行了raise语句,raise后面的语句将不能执行。 演示raise用法 try: s = None if s is None: print "s 是空对象" raise NameError #如果引发NameError异常,后面的代码将不能执行 print len(s) ...
python自定义异常,使用raise引发异常 1.自定义异常类,自定义的异常类必须是Exception或者Error的子类! 1#!/usr/bin/env python2#encoding: utf-834classIllegalException(Exception):5'''6Custom exception types7'''8def__init__(self, parameter, para_value):9err ='The parameter "{0}" is not legal:{...
self.logger.warning(Fore.YELLOW + "WARNING - " + str(msg) + Style.RESET_ALL) def error(self, msg): self.logger.error(Fore.RED + "ERROR - " + str(msg) + Style.RESET_ALL) def critical(self, msg): self.logger.critical(Fore.RED + "CRITICAL - " + str(msg) + Style.RESET_ALL)...
Raise exceptions as soon as possible: You should check error conditions and exceptional situations early in your code. This practice will make your code more efficient by avoiding unnecessary processing that a delayed error check could throw away. This practice fits the fail-fast design. Explain th...
fields=/huawei-patch:patch({filtering_str})') req_data = None ret, _, rsp_data = ops_conn.get(uri, req_data) if ret == http.client.NOT_FOUND: return None, None if ops_return_result(ret) or rsp_data == '': raise OPIExecError('Failed to get the patch file information') root...
To handle those situations, it’s always a good idea to use the timeout parameter of the run() function. Passing a timeout=1 argument to run() will cause the function to shut down the process and raise a TimeoutExpired error after one second: Python >>> import subprocess >>> ...
close() except Exception: pass def _wait_lock(self): """Wait until notified or report an error.""" if not self._blocking: raise TooManyConnections self._lock.wait()# Auxiliary classes for pooled connectionsclass PooledDedicatedDBConnection: """Auxiliary proxy class for pooled dedicated ...
prodEnvOptionGroup.add_option("-p","--params", metavar="<parameter used in job config>", action="store", dest="params", help='Set job parameter, eg: the source tableName you want to set it by command,''then you can use like this: -p"-DtableName=your-table-name",''if you ha...
try:# 一些可能引发错误的代码raiseValueError("Invalid parameter")exceptValueErrorase:# 错误处理代码print("Error occurred:",str(e)) 1. 2. 3. 4. 5. 6. 在上述示例中,我们使用try-except语句包围可能引发错误的代码。如果在try块中的代码引发了一个ValueError错误,那么except块中的代码将会执行。在这个示例...