Python的try-except结构是程序健壮性的重要保障。其核心用法体现在三个层面: 精准捕获异常 通过指定具体异常类型,可实现针对性错误处理: try: file = open('data.txt') except FileNotFoundError: # 专门处理文件未找到的情况 print('文件不存在,请检查路径') except PermissionError: #...
The plain try-except block will catch any type of error. But, we can be more specific. For instance, we may be interested in only a particular type of error or want to handle different types of error differently. The type of error can be specified with the except statement. Consider the...
ImportError 无法引入模块或包;基本上是路径问题或名称错误 IndentationError 语法错误(的子类) ;代码没有正确对齐 IndexError 下标索引超出序列边界,比如当x只有三个元素,却试图访问x[5] KeyError 试图访问字典里不存在的键 KeyboardInterrupt Ctrl+C被按下 NameError 使用一个还未被赋予对象的变量 SyntaxError Python代...
try:# 可能引发异常的代码exceptExceptionType:# 处理异常logging.error('An error occurred.')raise# 重新抛出异常,保持原始堆栈跟踪信息 自定义异常: 如前所述,Python允许开发者自定义异常类,以便更好地符合应用程序的需求: classCustomError(Exception):def__init__(self, message):self.message = messagesuper(...
AssertionError #报断言异常错误 3. 正则化、替换异常值 #输出结果整合:importjsonfrompprintimportpprintimportjsonimportpandasaspd enddate=timeUtils().getAnyDay(-1) input_path= result_path = output_path =defget_textLine(path): string_list = [] ...
See more Error types in ourPython Built-in Exceptions Reference. Else You can use theelsekeyword to define a block of code to be executed if no errors were raised: Example In this example, thetryblock does not generate any error:
Read theZen of Python, understanding that there are principles that are in tension, and be wary of dogma that relies too heavily on any one of the statements in it.阅读Python的Zen,了解其中存在一些紧绷的原则,并且要警惕过于依赖其中任何一种陈述的教条。
The 'else' block runs only if the ‘try’ block executes successfully without any exceptions. It's useful for code that should run only when no errors occur.Example 5: 'finally' BlockIn this example, we attempt to open a non-existent file, raising a 'FileNotFoundError'. The 'finally'...
Python Selenium是一个用于自动化浏览器操作的工具,可以模拟用户在浏览器中的行为。Try/Except是Python中的异常处理机制,用于捕获和处理代码中可能出现的异常情况。 在Pyth...
python中except⽤法_Python中except⽤法和作⽤ Python的except⽤来捕获所有异常, 因为Python⾥⾯的每次错误都会抛出 ⼀个异常,所以每个程序的错误都被当作⼀个运⾏时错误。 以下是使⽤except的⼀个例⼦: try: foo = opne(”file”) #open被错写为opne except: sys.exit(”could not open fi...