Python Error Types Valueerror
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a try statement with an except clause that mentions a particular class, that clause also handles any exception classes derived from that class (but not exception classes valueerror python from which it is derived). Two exception classes that are not related via python valueerror example subclassing are never equivalent, even if they have the same name. The built-in exceptions listed below can be generated by
Python Filenotfounderror
the interpreter or built-in functions. Except where mentioned, they have an "associated value" indicating the detailed cause of the error. This may be a string or a tuple of several items of information
Python Custom Exception
(e.g., an error code and a string explaining the code). The associated value is usually passed as arguments to the exception class's constructor. User code can raise built-in exceptions. This can be used to test an exception handler or to report an error condition "just like" the situation in which the interpreter raises the same exception; but beware that there is nothing to prevent user code from python exception message raising an inappropriate error. The built-in exception classes can be subclassed to define new exceptions; programmers are encouraged to derive new exceptions from the Exception class or one of its subclasses, and not from BaseException. More information on defining exceptions is available in the Python Tutorial under User-defined Exceptions. When raising (or re-raising) an exception in an except or finally clause __context__ is automatically set to the last exception caught; if the new exception is not handled the traceback that is eventually displayed will include the originating exception(s) and the final exception. When raising a new exception (rather than using a bare raise to re-raise the exception currently being handled), the implicit exception context can be supplemented with an explicit cause by using from with raise: raise new_exc from original_exc The expression following from must be an exception or None. It will be set as __cause__ on the raised exception. Setting __cause__ also implicitly sets the __suppress_context__ attribute to True, so that using raise new_exc from None effectively replaces the old exception with the new one for display pur
you have probably seen some. There are (at least) two distinguishable kinds of errors: syntax errors and exceptions. 8.1. Syntax Errors¶ Syntax errors, also known as parsing errors, are perhaps the most common kind of complaint you get
Python Exception Class Methods
while you are still learning Python: >>> while True print 'Hello world' File "
Python - Basic Syntax Python - Variable Types Python - Basic Operators Python - Decision Making Python - Loops Python - Numbers Python - Strings Python - Lists Python - Tuples Python - Dictionary Python - Date & https://www.tutorialspoint.com/python/standard_exceptions.htm Time Python - Functions Python - Modules Python - Files I/O Python - Exceptions Python Advanced Tutorial Python - Classes/Objects Python - Reg Expressions Python - CGI Programming Python - Database Access Python - Networking http://stackoverflow.com/questions/4097461/python-valueerror-error-message Python - Sending Email Python - Multithreading Python - XML Processing Python - GUI Programming Python - Further Extensions Python Useful Resources Python - Questions and Answers Python - Quick Guide Python - Tools/Utilities Python python exception - Useful Resources Python - Discussion Selected Reading Developer's Best Practices Questions and Answers Effective Resume Writing HR Interview Questions Computer Glossary Who is Who Python Standard Exceptions Advertisements Previous Page Next Page Here is a list all the standard Exceptions available in Python: EXCEPTION NAMEDESCRIPTION ExceptionBase class for all exceptions StopIterationRaised when the next() method of an iterator does not point to any object. SystemExitRaised by the sys.exit() function. python error types StandardErrorBase class for all built-in exceptions except StopIteration and SystemExit. ArithmeticErrorBase class for all errors that occur for numeric calculation. OverflowErrorRaised when a calculation exceeds maximum limit for a numeric type. FloatingPointErrorRaised when a floating point calculation fails. ZeroDivisonErrorRaised when division or modulo by zero takes place for all numeric types. AssertionErrorRaised in case of failure of the Assert statement. AttributeErrorRaised in case of failure of attribute reference or assignment. EOFErrorRaised when there is no input from either the raw_input() or input() function and the end of file is reached. ImportErrorRaised when an import statement fails. KeyboardInterruptRaised when the user interrupts program execution, usually by pressing Ctrl+c. LookupErrorBase class for all lookup errors. IndexErrorRaised when an index is not found in a sequence. KeyErrorRaised when the specified key is not found in the dictionary. NameErrorRaised when an identifier is not found in the local or global namespace. UnboundLocalErrorRaised when trying to access a local variable in a function or method but no value has been assigned to it. EnvironmentErrorBase class for all exceptions that occur outside the Python environment. IOErrorRaised when an input/ output operation fails, such as the print statement or the open() function when trying to open a file that does not exist. OSErrorRaised for operating system-related errors. Syn
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