On 04Nov2017 20:59, Peter J. Holzer <hjp-usen...@hjp.at> wrote:
On 2017-11-04 19:42, Stefan Ram <r...@zedat.fu-berlin.de> wrote:
What is better:
...
import math
...
... math.cos ...
or
...
from math import cos
...
... cos ...
?
(To me, the first is more readable, because at the site
where »math.cos« is used, it is made clear that »cos«
comes from math.
If I'm doing trigonometric computations I think the *second* is *much*
more readable. I'm using the well-known cosine function - that this was
imported from the math module is pure noise.
For other functions this may be less clear. I tend to use the first
style more often, although that gets a bit verbose sometimes
(os.path.join(os.path.dirname(...), ...)), [...]
I think the same. If the function is well known and idstinctively named, just
use the short form ("cos(value)").
I also use the first style, but not often.
Regarding the less clear function names, particularly things like
"os.path.join", my os.path imports often look like this these days:
from os.path import dirname, exists as pathexists, isdir as pathisdir, join as
joinpath
This lets me use distinct but short names in the code. To take Peter's example:
joinpath(dirname(...), ...)
You can see I've given a distinctive name to "join", which would otherwise be
pretty vague.
Cheers,
Cameron Simpson <c...@cskk.id.au> (formerly c...@zip.com.au)"
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