On 2018-05-11 11:08, Brendan Barnwell wrote:
. . . and it's true the latter is a bit more verbose in that case for
little extra benefit. But when the locally-defined value is used within
a more complicated expression (like the quadratic formula example), I
think readability goes down significantly. To appease Tim, instead of
using the quadratic formula, though, I will use a more realistic example
that comes up fairly often for me: wanting to do some kind of
normalization on a piece of data for a comparison, while keeping the
unnormalized data for use within the block:
if some_condition and (stuff:=
get_user_input()).lower().strip().replace('-', ''):
versus
if some_condition and stuff.lower().strip().replace('-', '') given
stuff = get_user_input():
Ironically I weakened my argument by forgetting to finish my expression
there. I intended that chain of method calls to be used in a comparison
to make the surrounding expression more complex. So revise the above to
if some_condition and (stuff :=
get_user_input()).lower().strip().replace('-', '') == existing_value:
versus
if some_condition and stuff.lower().strip().replace('-', '') ==
existing_value given stuff = get_user_input():
--
Brendan Barnwell
"Do not follow where the path may lead. Go, instead, where there is no
path, and leave a trail."
--author unknown
_______________________________________________
Python-ideas mailing list
Python-ideas@python.org
https://mail.python.org/mailman/listinfo/python-ideas
Code of Conduct: http://python.org/psf/codeofconduct/
