Python Halt On Error
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Python Raise Exception And Exit
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Python Exit Try Block
million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Stop Python code without an error up vote 3 down vote favorite 1 I have a piece of code
Python On Error Exit
which is not in a function, say x = 5 y = 10 if x > 5: print("stopping") What can I put after the print statement to stop the code from running further? Sys.exit() works, but raises an error that I don't want in the program. I want it to quietly stop the code as if it had reached the end of the main loop. Thanks. python python-3.3 share|improve this question edited python exit on exception May 29 '15 at 4:02 EOL 39.6k21124181 asked Apr 28 '13 at 2:35 Nick Taber 7218 2 Python always raise SystemError on exit. You are probably catching everything in an except block. And you shouldn't do that –JBernardo Apr 28 '13 at 2:37 @JBernardo: Good point. You mean SystemExit, though. :) –EOL Apr 28 '13 at 3:14 @EOL That's right. –JBernardo Apr 28 '13 at 3:29 add a comment| 5 Answers 5 active oldest votes up vote 8 down vote accepted As JBernardo pointed out, sys.exit() raises an exception. This exception is SystemExit. When it is not handled by the user code, the interpreter exits cleanly (a debugger debugging the program can catch it and keep control of the program, thanks to this mechanism, for instance)—as opposed to os._exit(), which is an unconditional abortion of the program. This exception is not caught by except Exception:, because SystemExit does not inherit from Exception. However, it is caught by a naked except: clause. So, if your program sees an exception, you may want to catch fewer exceptions by using except Exception: instead of except:. That said, catching all exceptions is discouraged, because this might hide real problems, so avoid it if you can, by making the except clause (if any) more specific. M
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies python error types of this site About Us Learn more about Stack Overflow the company Business python exception message Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask python raise custom exception 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 http://stackoverflow.com/questions/16258971/stop-python-code-without-an-error up How do I abort the execution of a Python script? [duplicate] up vote 80 down vote favorite 13 Possible Duplicate: Terminating a Python script I have a simple Python script that I want to stop executing if a condition is met. For example: done = True if done: # quit/stop/exit else: # do other stuff Essentially, I am looking for something http://stackoverflow.com/questions/179369/how-do-i-abort-the-execution-of-a-python-script that behaves equivalently to the 'return' keyword in the body of a function which allows the flow of the code to exit the function and not execute the remaining code. python syntax scripting exit share|improve this question asked Oct 7 '08 at 16:46 Ray Vega 52.6k79175177 marked as duplicate by Mark Byers, Michael Mrozek, danben, gnovice, sth Aug 1 '10 at 18:04 This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question. add a comment| 9 Answers 9 active oldest votes up vote 137 down vote accepted To exit a script you can use, import sys sys.exit() You can also provide an exit status value, usually an integer. import sys sys.exit(0) Exits with zero, which is generally interpreted as success. Non-zero codes are usually treated as errors. The default is to exit with zero. import sys sys.exit("aa! errors!") Prints "aa! errors!" and exits with a status code of 1. There is also an _exit() function in the os module. The sys.exit() function raises a SystemExit exception to exit the program,
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 https://docs.python.org/2.7/tutorial/errors.html get while you are still learning Python: >>> while True print 'Hello world' File "