Python Standard Error Exception
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a try statement with an except clause that mentions a particular class, that clause also handles any exception classes derived python typeerror from that class (but not exception classes from which it is
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derived). Two exception classes that are not related via subclassing are never equivalent, even if they have the python filenotfounderror same name. The built-in exceptions listed below can be generated by the interpreter or built-in functions. Except where mentioned, they have an "associated value" indicating the detailed cause of python custom exception the error. This may be a string or a tuple of several items of information (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
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"just like" the situation in which the interpreter raises the same exception; but beware that there is nothing to prevent user code from 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
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Modules Python - Files I/O Python - Exceptions Python Advanced Tutorial Python - Classes/Objects Python - Reg Expressions Python - CGI Programming Python - Database Access https://docs.python.org/3/library/exceptions.html Python - Networking 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 - Useful Resources Python - Discussion Selected Reading Developer's Best Practices Questions and Answers https://www.tutorialspoint.com/python/standard_exceptions.htm 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. 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 f
Exception StandardError ArithmeticError LookupError EnvironmentError Raised Exceptions AssertionError AttributeError EOFError FloatingPointError GeneratorExit IOError ImportError IndexError KeyError KeyboardInterrupt MemoryError NameError NotImplementedError OSError OverflowError ReferenceError RuntimeError StopIteration https://pymotw.com/2/exceptions/ SyntaxError SystemError SystemExit TypeError UnboundLocalError UnicodeError ValueError ZeroDivisionError Warning Categories Navigation Table of Contents Previous: Built-in Objects Next: String Services This Page Show Source Examples The output from all the example programs from PyMOTW has been generated with Python 2.7.8, unless otherwise noted. Some of the features described here may not be available in earlier versions of Python. If you are looking python exception for examples that work under Python 3, please refer to the PyMOTW-3 section of the site. Navigation index modules | next | previous | PyMOTW » Built-in Objects » exceptions - Built-in error classes¶ Purpose:The exceptions module defines the built-in errors used throughout the standard library and by the interpreter. Available In:1.5 and later Description¶ In the past, Python has supported simple string python standard error messages as exceptions as well as classes. Since 1.5, all of the standard library modules use classes for exceptions. Starting with Python 2.5, string exceptions result in a DeprecationWarning, and support for string exceptions will be removed in the future. Base Classes¶ The exception classes are defined in a hierarchy, described in the standard library documentation. In addition to the obvious organizational benefits, exception inheritance is useful because related exceptions can be caught by catching their base class. In most cases, these base classes are not intended to be raised directly. BaseException¶ Base class for all exceptions. Implements logic for creating a string representation of the exception using str() from the arguments passed to the constructor. Exception¶ Base class for exceptions that do not result in quitting the running application. All user-defined exceptions should use Exception as a base class. StandardError¶ Base class for built-in exceptions used in the standard library. ArithmeticError¶ Base class for math-related errors. LookupError¶ Base class for errors raised when something can't be found. EnvironmentError¶ Base class for errors that come from outside of Python (the operating system, filesystem, etc.). Raised Exceptions¶ Assertion