Python Value Error Message
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here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of valueerror python this site About Us Learn more about Stack Overflow the company Business Learn python exception message more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question python custom exception x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 6.2 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Python python raise valueerror ValueError error message up vote 10 down vote favorite 1 How can I actually print out the ValueError's message after I catch it? python exception exception-handling python-3.x share|improve this question asked Nov 4 '10 at 14:07 wrongusername 5,2712172161 10 @wrongusername: Hi, let me introduce you to @S.Lott, general Questionazi around here and apparently now also The Inquestionitor. –martineau Nov 4 '10 at
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15:26 4 No one expects the S Lott inquestion! –kindall Nov 4 '10 at 16:51 1 @kindall: That's right, nobody -- much like the SPANISH INQUISITION... –martineau Nov 4 '10 at 18:53 1 Sorry for asking. But I need to know what people are using to learn Python. –S.Lott Nov 5 '10 at 2:27 3 @wrongusername: Please update your question for the benefit the other few thousand people who will search for it. This site isn't about you. It's about everyone who has a problem like yours. –S.Lott Nov 5 '10 at 18:45 | show 7 more comments 1 Answer 1 active oldest votes up vote 24 down vote accepted try: ... except ValueError as e: print(e) share|improve this answer answered Nov 4 '10 at 14:11 snapshoe 5,42411322 Wow, works perfect! –wrongusername Nov 4 '10 at 14:13 4 Note that in Python 3 you have to cast to string explicitly: print(str(e)). –Bengt Jun 5 '13 at 11:59 add a comment| Your Answer draft saved draft discarded Sign up or log in Sign up using Google Sign up using Facebook Sign
This module never needs to be imported explicitly: the exceptions are provided in the built-in namespace as
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well as the exceptions module. For class exceptions, in a python catch multiple exceptions try statement with an except clause that mentions a particular class, that clause python print exception also handles any exception classes derived from that class (but not exception classes from which it is derived). Two exception classes that are not related via http://stackoverflow.com/questions/4097461/python-valueerror-error-message subclassing are never equivalent, even if they have the 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 the error. This may be a string or a tuple containing several items https://docs.python.org/2/library/exceptions.html of information (e.g., an error code and a string explaining the code). The associated value is the second argument to the raise statement. If the exception class is derived from the standard root class BaseException, the associated value is present as the exception instance's args attribute. 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 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. The following exceptions are only used as base classe
Pages Local Site Map ------------------------ Rename Page Delete Page ------------------------ ------------------------ Remove Spam Revert to this revision ------------------------ SlideShow User Login Handling Exceptions The simplest way to handle exceptions is with a "try-except" block: 1 (x,y) = (5,0) 2 try: 3 z = x/y 4 except ZeroDivisionError: https://wiki.python.org/moin/HandlingExceptions 5 print "divide by zero" If you wanted to examine the exception from code, you could have: 1 (x,y) = (5,0) 2 try: 3 z = x/y 4 except ZeroDivisionError as e: 5 https://www.tutorialspoint.com/python/python_exceptions.htm z = e # representation: " Error: %s
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