Good code patterns in Python

Bob Gailer bgailer at alum.rpi.edu
Tue Jul 1 20:20:42 CEST 2003


>Will Stuyvesant writes:
> > If you know that your source code is going to be used
> > later by others, then I feel that code with the pattern:
> >
> >     if some_condition:
> >         some_name = some_value
> >     else:
> >         some_name = other_value
> >
> > is often a mistake.  Much better, safer, would be:
> >
> >     some_name = some_value
> >     if not some_condition:
> >         some_name = other_value

This brings back the good old days of FORTRAN IV which had a 
single-statement IF and no ELSE. Thus:
       C = VALUE1
       IF ( A .EQ. B) C = VALUE2
Notice the indentation. Cols 1-5 were reserved for line # and col 6 for the 
continuation code. So Python is not the only indentation dependent 
language. Nor is it the first to use indentation to convey structure.

Bob Gailer
bgailer at alum.rpi.edu
303 442 2625
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