在Python中,我们通过使用命令dir(__builtin__)来查看所有的异常类型,如图所示: 在此,我们列举几个常见的异常并加以具体描述: BaseException:所有异常的基类 Exception:常规异常的基类 AttributeError:对象不存在此属性 IndexError:序列中无此索引 IOError:输入/输出操作失败 KeyError:映射中不存在
res=a/b except BaseException as e: print('出错了') print(e) else: print('结果为:',res) finally: print('感谢使用') 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 执行结果: Python中常见的异常类型 代码举例: ZeroDivisionError举例 a=int(input('请输入一个整数:')) b=in...
withopen("scores.txt","rb")asp:lines=[x.decode()forxinp.readlines()]# applyingdecode()forlineinlines:string=line.split('-')# no exception raised because line isof'str'typeif'Ravi'instring[0]:print('Marks obtained by Ravi:',string[1].strip()) 输出: 代码语言:javascript 代码运行次数:0...
您好，在Python中，各种异常错误都是类，所有的错误类型都继承于BaseException。在用try...except...finally...机制处理异常的时候，一定要注意异常的继承关系。例如在except中如果有StandardError，那么永远也捕获不到ValueError，因为ValueError是StandardError的子类，如果有，也被StandardError的except给捕获了...
The TypeError: ‘NoneType’ object is not subscriptableerror is the most common exception in Python, and it will occur if you assign the result of built-in methods likeappend(),sort(), andreverse()to a variable. When you assign these methods to a variable, it returns aNonevalue. Let’s...
lines = [x.decode()forxinp.readlines()] # applying decode()forlineinlines:string=line.split('-') # no exception raised becauselineisof'str'typeif'Ravi'instring[0]: print('Marksobtained by Ravi:',string[1].strip()) 输出: Marks obtainedbyRavi:65 ...
>>> for i in D: ... values=[] ... values.append((i,'str'+str(i)))#values.append((i,'str'+i)) -->TypeError: cannot concatenate 'str' and 'int' objects ... print values ... [(0, 'str0')] [(1, 'str1')]
问Python:导入RandomForestClassifier时出现"TypeError:无法使用块值进行操作“EN👨💻个人主页： 才...
Python implementation: CPython Virtual environment: Yes OS: Windows 11 (64bit) Git version: git version 2.39.1.windows.1 An uncaught exception occurred: Traceback (most recent call last): File "<frozen runpy>", line 198, in _run_module_as_main ...
TypeError: catching classes that do not inherit from BaseException is not allowed this was originally raised on pyright:microsoft/pyright#7921, however this seems more like a bug in python. as@erictrautpoints out, generic aliases are an implementation detail and should act as normal classes in ...