Python Exception Syntax 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. python exception class Syntax Errors¶ Syntax errors, also known as parsing errors, are perhaps python exception message the most common kind of complaint you get while you are still learning Python: >>> while True print('Hello python custom exception world') File "
Python Raise Valueerror
point in the line where the error was detected. The error is caused by (or at least detected at) the token preceding the arrow: in the example, the error is detected at the function print(), since a colon (':') is missing before it. File name and line number are printed so you know where to python exception stack trace look in case the input came from a script. 8.2. Exceptions¶ Even if a statement or expression is 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 Catch Multiple Exceptions
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minute: Sign up What's wrong with my try: except: syntax? up vote 2 down vote favorite Choking code: while port < 0 or port > 65535: try: port = int(raw_input("Enter port: ") except ValueError: print "Invalid port number." Result: File "/Users/.../Documents/.../CS https://docs.python.org/3/tutorial/errors.html 176A/TCPServer.py", line 10 except ValueError: ^ SyntaxError: invalid syntax python exception-handling syntax-error share|improve this question asked Sep 28 '10 at 6:40 Brian D 3,27293978 What tutorial are you using? What code editor are you using? –S.Lott Sep 28 '10 at 10:01 There was no tutorial. I was just trying to build a simple TCP server and client. TextWrangler is the editor. –Brian D Oct 9 '10 at 20:14 add a comment| 2 Answers 2 active oldest votes up vote http://stackoverflow.com/questions/3810279/whats-wrong-with-my-try-except-syntax 18 down vote accepted Missing right parenthesis. Change to port = int(raw_input("Enter port: ")) share|improve this answer answered Sep 28 '10 at 6:41 Manoj Govindan 35.1k1393101 Thanks. Not seeing clearly. –Brian D Sep 28 '10 at 6:42 by 9 seconds. that was down to the wire. –aaronasterling Sep 28 '10 at 6:42 1 @Aaron: =P #padding to post the comment. –Manoj Govindan Sep 28 '10 at 6:44 Haha yeah, you guys are both pretty fast.. good work. –Brian D Sep 28 '10 at 6:44 add a comment| up vote 11 down vote BTW, as a rule, whenever you receive interpreter/compiler errors, start looking for problems one line before the reported line. share|improve this answer answered Sep 28 '10 at 6:53 bgbg 7,9391668125 Yeah, that's a good tip. I was focused on the except, thinking it was my version of python or something not imported... thanks. –Brian D Sep 28 '10 at 6:56 add a comment| Your Answer draft saved draft discarded Sign up or log in Sign up using Google Sign up using Facebook Sign up using Email and Password Post as a guest Name Email Post as a guest Name Email discard By posting your answer, you agree to the privacy policy and terms of service. Not the answer you're looking for? Browse other questions tagged python exception-handling syntax-error or ask your own question. asked 6 years ago viewed 15691 times active 2
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 http://stackoverflow.com/questions/2792491/try-else-except-syntax-error about hiring developers or posting ads with us Stack 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 try…else…except syntax error up vote 1 down vote favorite 1 I can't understand this... Cannot get this code to run and I've no idea why it is a python exception syntax error. try: newT.read() #existingArtist = newT['Exif.Image.Artist'].value #existingKeywords = newT['Xmp.dc.subject'].value except KeyError: print "KeyError" else: #Program will NOT remove existing values newT.read() if existingArtist != "" : newT['Exif.Image.Artist'] = artistString print existingKeywords keywords = os.path.normpath(relativePath).split(os.sep) print keywords newT['Xmp.dc.subject'] = existingKeywords + keywords newT.write() except: print "Cannot write tags to ",filePath Syntax error occurs on the last "except:". Again...I have no idea why python is throwing a syntax error (spent ~3hrs on this problem). python share|improve this question python exception syntax asked May 8 '10 at 0:52 iform 8838 add a comment| 3 Answers 3 active oldest votes up vote 15 down vote accepted You can't have another except after the else. The try, except, and else blocks aren't like function calls or other code - you can't just mix and match them as you like. It's always a specific sequence: try: # execute some code except: # if that code raises an error, go here # (this part is just regular code) else: # if the "try" code did not raise an error, go here # (this part is also just regular code) If you want to catch an error that occurs during the else block, you'll need another try statement. Like so: try: ... except: ... else: try: ... except: ... FYI, the same applies if you want to catch an error that occurs during the except block - in that case as well, you would need another try statement, like this: try: ... except: try: ... except: ... else: ... share|improve this answer answered May 8 '10 at 0:55 David Z 70k10161194 add a comment| up vote 3 down vote Reading the documentation would give you this phrase: The try ... except statement has an optional else clause, which, when present, must follow all except clauses. Move else to the end of your handler. share|improve this answer answ