Re: try...except...finally problem in Python 2.5

Paul Rubin writes: > Re your other post: yes, PEP 363 explains how the "with" statement Whoops, 343. -- http://mail.python.org/mailman/listinfo/python-list

Re: try...except...finally problem in Python 2.5

Steven D'Aprano <[EMAIL PROTECTED]> writes: > Yes it does. Eventually f goes out of scope and is closed automatically. Oh right, however you can't really predict when the closure occurs, unless you're relying on current CPython artifacts. Re your other post: yes, PEP 363 explains how the "with" s

Re: try...except...finally problem in Python 2.5

Replying to my own question... On Thu, 15 Feb 2007 13:17:00 +1100, Steven D'Aprano wrote: > I don't see where the "with" version closes the file either. How does it > know that I want to call the f's close() method, rather than, say, > f.exit() or f.do_something_else()? Ah, I *think* I see... fi

Re: try...except...finally problem in Python 2.5

On Wed, 14 Feb 2007 18:03:19 -0800, Paul Rubin wrote: > Steven D'Aprano <[EMAIL PROTECTED]> writes: >> self.isDataLoaded = False >> try: >> f = open(self.filename, 'rb') >> f.seek(DATA_OFFSET) >> self.__data = f.read(DATA_SIZE) >> self.isDataLoaded = True >> except: >> pass >>

Re: try...except...finally problem in Python 2.5

Steven D'Aprano <[EMAIL PROTECTED]> writes: > self.isDataLoaded = False > try: > f = open(self.filename, 'rb') > f.seek(DATA_OFFSET) > self.__data = f.read(DATA_SIZE) > self.isDataLoaded = True > except: > pass > else: > pass > > (apart from being four lines shorter) Your

Re: try...except...finally problem in Python 2.5

On Wed, 14 Feb 2007 12:09:34 -0800, Paul Rubin wrote: > "redawgts" <[EMAIL PROTECTED]> writes: >> try: >> f = file(self.filename, 'rb') ... >> Can someone tell me what's wrong with the code? > > Various people have explained the error: if the file open attempt > fails, f is n

Re: try...except...finally problem in Python 2.5

Thanks everybody, that helped alot. -- http://mail.python.org/mailman/listinfo/python-list

Re: try...except...finally problem in Python 2.5

"redawgts" <[EMAIL PROTECTED]> writes: > try: > f = file(self.filename, 'rb') ... > Can someone tell me what's wrong with the code? Various people have explained the error: if the file open attempt fails, f is never assigned. Doing it the right way (i.e. handling the potentia

Re: try...except...finally problem in Python 2.5

redawgts wrote: > I keep getting this error "local variable 'f' referenced before > assignment" in the finally block when I run the following code. > > try: > f = file(self.filename, 'rb') > f.seek(DATA_OFFSET) > self.__data = f.read(DATA_SIZE) >

Re: try...except...finally problem in Python 2.5

"redawgts" <[EMAIL PROTECTED]> wrote in message news:[EMAIL PROTECTED] >I keep getting this error "local variable 'f' referenced before > assignment" in the finally block when I run the following code. > >try: >f = file(self.filename, 'rb') >f.seek(DATA_OFFSET) >

Re: try...except...finally problem in Python 2.5

redawgts wrote: > I keep getting this error "local variable 'f' referenced before > assignment" in the finally block when I run the following code. > > try: > f = file(self.filename, 'rb') > f.seek(DATA_OFFSET) > self.__data = f.read(DATA_SIZE) >

Re: try...except...finally problem in Python 2.5

On 14 Feb 2007 11:41:29 -0800, redawgts <[EMAIL PROTECTED]> wrote: >I keep getting this error "local variable 'f' referenced before >assignment" in the finally block when I run the following code. > >try: >f = file(self.filename, 'rb') >f.seek(DATA_OFFSET) >