errors and exception
gherron at islandtraining.com
Mon Aug 16 09:29:26 CEST 2010
On 08/16/2010 12:06 AM, Alan wrote:
> I am using things like:
> except Exception as inst:
The old syntax for exceptions still works in Python2.x (all versions).
The new syntax works in Python2.6+ and Python3.
except Exception,msg: # Old syntax
> with open("myfile.txt") as f:
> for line in f:
> print line
You don't need the new fangled with statement if you want to be
compatible with older versions of Python2. (It's nice and convenient,
but not necessary.)
f = open("myfile.txt")
for line in f:
f.close() # This is what the "with" statement guarantees; so now just
do it yourself
> Things that seems to be new in python 2.6 and higher, however reading
> http://docs.python.org/tutorial/errors.html and this not clear when
> this new syntaxes appeared.
> My trouble is that I want to make something similar above compatible
> with python 2.5, but when running python2.5 I got:
> except Exception as msg:
> SyntaxError: invalid syntax
> If there's a way (e.g. from __future__ ..., inherited modified
> Exception class, etc) that could give a solution to keep my code in
> python 2.6 syntax as above but compatible with python 2.5, that would
> be appreciated.
> Many thanks in advance,
> Alan Wilter S. da Silva, D.Sc. - CCPN Research Associate
> Department of Biochemistry, University of Cambridge.
> 80 Tennis Court Road, Cambridge CB2 1GA, UK.
> >>http://www.bio.cam.ac.uk/~awd28 <http://www.bio.cam.ac.uk/%7Eawd28><<
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