Path: csiph.com!fu-berlin.de!uni-berlin.de!not-for-mail From: Dennis Lee Bieber Newsgroups: comp.lang.python Subject: Re: can try expect have if else. Date: Sun, 21 Feb 2016 13:49:14 -0500 Organization: IISS Elusive Unicorn Lines: 45 Message-ID: References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Trace: news.uni-berlin.de n/RHH9Aqe2rmjd0Rtoc2CwdTRuwk4O6edGBCWD9PkEPg== Return-Path: X-Original-To: python-list@python.org Delivered-To: python-list@mail.python.org X-Spam-Status: OK 0.001 X-Spam-Evidence: '*H*': 1.00; '*S*': 0.00; 'else:': 0.03; '"""': 0.05; 'caller': 0.07; 'exits': 0.09; 'message-id:@4ax.com': 0.09; 'received:80.91': 0.09; 'received:80.91.229': 0.09; 'received:gmane.org': 0.09; 'received:list': 0.09; 'python': 0.10; 'exception': 0.13; '2016': 0.16; 'itself;': 0.16; 'received:80.91.229.3': 0.16; 'received:io': 0.16; 'received:plane.gmane.org': 0.16; 'received:psf.io': 0.16; 'skip:> 20': 0.16; 'succeeds,': 0.16; 'result,': 0.18; 'try:': 0.18; 'url:home': 0.18; 'team,': 0.18; 'input': 0.18; 'code.': 0.23; 'feb': 0.23; "doesn't": 0.26; 'header:X-Complaints-To:1': 0.26; '2.6': 0.27; 'executing': 0.27; 'function': 0.28; 'raise': 0.29; 'except': 0.34; 'gets': 0.35; 'false': 0.35; 'there': 0.36; 'success.': 0.36; 'to:addr:python-list': 0.36; 'subject:: ': 0.37; 'received:org': 0.37; 'charset:us-ascii': 0.37; 'test': 0.39; 'skip:e 20': 0.39; 'to:addr:python.org': 0.40; 'reached': 0.60; 'real': 0.62; 'back': 0.62; 'transfer': 0.73; 'subject:have': 0.80; '>def': 0.84; 'subject:try': 0.84; 'dennis': 0.91; 'received:108': 0.93 X-Injected-Via-Gmane: http://gmane.org/ X-Gmane-NNTP-Posting-Host: adsl-108-68-179-144.dsl.klmzmi.sbcglobal.net X-Newsreader: Forte Agent 6.00/32.1186 X-No-Archive: YES X-BeenThere: python-list@python.org X-Mailman-Version: 2.1.21rc2 Precedence: list List-Id: General discussion list for the Python programming language List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Xref: csiph.com comp.lang.python:103315 On Sun, 21 Feb 2016 21:42:18 +0530, Ganesh Pal declaimed the following: >Hi Team, > >Iam on python 2.6 , need input on the below piece of code. > > >EXIT_STATUS_ERROR=1 > >def create_dataset(): > """ > """ > logging.info("Dataset create.....Started !!!") > try: > if os.path.ismount("/nfs_mount"): > touch_file("inode_fixcrc.txt") > logging.info("Dataset create.....Done !!!") > else: > raise Exception("/nfs_mount is not mounted. Dataset create >failed !!!") > return False The return will never be reached -- executing "raise" will result in an immediate transfer to ... > except Exception as e: ... this exception handler... > logging.error(e) > sys.stderr.write("Dataset create failed...Exiting !!!") > sys.exit(EXIT_STATUS_ERROR) ... which forcibly exits the program. > return True As a result, this True is of no real use. If the function doesn't succeed, the program kills itself; the only way a caller gets control back is when the function succeeds, so there is no need to test for success. -- Wulfraed Dennis Lee Bieber AF6VN wlfraed@ix.netcom.com HTTP://wlfraed.home.netcom.com/