Python Exception Print Error
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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
Python Print Exception Message
parsing errors, are perhaps the most common kind of complaint you get while python exception class you are still learning Python: >>> while True print 'Hello world' File "
Python Exception Stack Trace
world' ^ SyntaxError: invalid syntax The parser repeats the offending line and displays a little ‘arrow' pointing at the earliest point in the line where the error was detected. The error syntax for generic except clause in python is caused by (or at least detected at) the token preceding the arrow: in the example, the error is detected at the keyword print, since a colon (':') is missing before it. File name and line number are printed so you know where to look in case the input came from a script. 8.2. Exceptions¶ Even if a statement or expression is python custom exception syntactically correct, it may cause an error when an attempt is made to execute it. Errors detected during execution are called exceptions and are not unconditionally fatal: you will soon learn how to handle them in Python programs. Most exceptions are not handled by programs, however, and result in error messages as shown here: >>> 10 * (1/0) Traceback (most recent call last): File "
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Python Try Without Except
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Python Try Else
Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 6.2 million programmers, just like you, helping https://docs.python.org/2.7/tutorial/errors.html each other. Join them; it only takes a minute: Sign up How to print an error in Python? up vote 118 down vote favorite 32 try: something here except: print 'the whatever error occurred.' How can I print the error in my except: block? python error-handling exception-handling share|improve this question edited Jan 1 at 6:49 Slothworks 470514 http://stackoverflow.com/questions/1483429/how-to-print-an-error-in-python asked Sep 27 '09 at 11:48 TIMEX 41.2k201525826 6 The currently accepted answer doesn't work in Python 3, and the prettier except Exception as e: syntax has existed since Python 2.6 (which, incidentally, had been out for a year before even the accepted answer was posted 6 years ago). Pretty much nobody is using 9-year-old Python 2.5 or earlier nowadays, and Python 3's popularity is growing relative to 2.7. It would be helpful for future visitors if you were to accept ilya n's answer instead, since it covers all Python versions; could you please do so? –Mark Amery Nov 4 '15 at 11:50 add a comment| 5 Answers 5 active oldest votes up vote 191 down vote accepted except Exception,e: print str(e) share|improve this answer answered Sep 27 '09 at 12:19 jldupont 41.9k32140259 11 the str() part is redundant -- print e is exactly the same thing as print str(e) [[i.e., print does its own stringification]]. –Alex Martelli Sep 27 '09 at 16:40 4 @alex: doesn't it depend
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 this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack http://stackoverflow.com/questions/4560288/python-try-except-showing-the-cause-of-the-error-after-displaying-my-variables Overflow Questions Jobs Documentation Tags Users Badges Ask Question 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 try/except: Showing the cause of the error after displaying my variables up vote 12 down vote favorite 8 I'm not even sure what the right words are to search for. I want to display parts of the error object in an except block (similar python exception to the err object in VBScript, which has Err.Number and Err.Description). For example, I want to show the values of my variables, then show the exact error. Clearly, I am causing a divided-by-zero error below, but how can I print that fact? try: x = 0 y = 1 z = y / x z = z + 1 print "z=%d" % (z) except: print "Values at Exception: x=%d y=%d " % (x,y) print "The error was on line ..." print "The reason for the error python exception print was ..." python exception-handling share|improve this question edited Aug 18 '15 at 9:27 jonrsharpe 60k84180 asked Dec 30 '10 at 5:43 NealWalters 3,8611770126 No, that's not how... –Ignacio Vazquez-Abrams Dec 30 '10 at 6:00 add a comment| 5 Answers 5 active oldest votes up vote 15 down vote accepted If you're expecting a DivideByZero error, you can catch that particular error import traceback try: x = 5 y = 0 print x/y except ZeroDivisionError: print "Error Dividing %d/%d" % (x,y) traceback.print_exc() except: print "A non-ZeroDivisionError occurred" You can manually get the line number and other information by calling traceback.print_exc() share|improve this answer answered Dec 30 '10 at 5:55 sahhhm 3,8421522 Thanks. I was really looking for the "traceback" - couldn't remember what it was called, because I was looking for an error or exception object. –NealWalters Dec 30 '10 at 6:04 The DivideByZero was just a simple error used for my post, my actual situation is much more complex. –NealWalters Dec 30 '10 at 6:10 add a comment| up vote 26 down vote try: 1 / 0 except Exception as e: print e share|improve this answer edited Jul 2 '13 at 17:07 answered Dec 30 '10 at 5:56 Corey Goldberg 26k2088104 1 Doesn't give stack-trace or line-number of error. –NealWalters Dec 30 '10 at 6:06 7 it gives the reason, which is what your original question asked for. –Corey Goldberg Dec 30 '10 at 6:07 Python 3 syntax : replace print e by print (e) &ndash