Figure 20.4:Built-in exceptions The classBaseException is the base class of all the built-in exception classes. FromBaseException, four classes namedException,SystemExit,KeyboardInterrupt andGeneratorExit are derived. All the remaining built-in exception classes are derived directly or indirectly from th...
Built-in ExceptionsThe table below shows built-in exceptions that are usually raised in Python:ExceptionDescription ArithmeticError Raised when an error occurs in numeric calculations AssertionError Raised when an assert statement fails AttributeError Raised when attribute reference or assignment fails ...
异常是程序运行时可能发生的错误或意外情况。在Python中,异常是一种对象,表示程序执行期间发生的错误。 当出现异常时,程序的正常流程会被中断,而是跳转到异常处理流程。 【二】异常分类 在Python中,异常分为两类: 内建异常(Built-in Exceptions):由Python内部定义的异常,例如ZeroDivisionError、NameError等。 用户自定...
Exception hierarchy¶ The class hierarchy for built-in exceptions is: BaseException +-- SystemExit +-- KeyboardInterrupt +-- GeneratorExit +-- Exception +-- StopIteration +-- StopAsyncIteration +-- ArithmeticError | +-- FloatingPointError | +-- OverflowError | +-- ZeroDivisionE...
Errors and Exceptions 错误是由语法不正确产生的; 异常是没有语法错误的情况下,执行期间产生的。 Built-in Exceptions 列出的内建的异常及其含义。 异常捕获语句: try: # do something except ValueError: # handle ValueError exception except (IndexError, ZeroDivisionError): # handle multiple exceptions # Index...
官网地址:Built-in Exceptions — Python 3.11.3 documentation 3、异常处理 3.1 try...except...语句 语法格式: AI检测代码解析 try: "代码块" except ExceptionName: "捕获指定类型的异常,执行此代码块" except Exception: "捕获异常,执行此代码块" ...
python标准库内置了大量的函数和类,是python解释器里的核心功能之一。该标准库在python安装时候就已经存在。 python内置对象 内置函数:Built-in Functions 如print() 内置常量:Built-in Constants 如false 内置类型:Built-in Types 内置异常:Built-in Exceptions ...
Python 基本built-in类型主要有numerics,sequences, mapping, files, classes, instances, exceptions,类型上都会存在的操作有比较、是否为真、转换为字符串toString,Python中使用str/repr(object)可转换为字符串, print(object)时会隐式调用str()。 numerics: ...
Python 语言将常见的异常列为内置类型,表中列举了几种常见的内置异常,更多内容推荐参阅官方文档(https://docs.python.org/3/library/exceptions.html#built-in-exceptions)。 默认情况下,在程序运行到某处代码出现异常时,将会抛出异常并且立即退出程序。 如果想让程序遇到异常时,能够继续运行而不退出,就需要对异常进行...
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: