Vern Ceder wrote:
<div class="moz-text-flowed" style="font-family: -moz-fixed">Hi Sander,
PEP 8, the "Style Guide for Python Code"
http://www.python.org/dev/peps/pep-0008/ is pretty clear that the
shorter version is preferable:
if s:
if n:
if b:
if not b:
and so on...
Cheers,
Vern
Sander Sweers wrote:
Hi Tutors,
I am going through someone's python script and I am seeing a lot of the
following boolean checks.
if not s == ""
if not n == 0
if b == True
if not b == True
etc..
All of these can be written without the == notation like "if n", "if s"
etc.
Now in this case where it is only used as boolean checks which would be
the most pythonic way if writing these checks?
Thanks
Sander
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The shorter version may be preferable, but it doesn't generally give the
same results. Without knowing the possible data, these substitutions
are not safe.
For example, replacing "if not n == 0" with "if n"
will give different results for values of "", [] and so on. It
WILL work if you know that n is an int or float, however.
DaveA
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