Skip-unpacking of selected tuple elements: for y,x, _, _, _, _ in P[2]: ...

[Twenkid]

Do you know that syntax trick? Probably a bit faster, too. If there are elements of a tuple that won't be used, they could be skipped (readability ("remindability") could be preserved with a comment):

  for y, x, _, _, _, _ in P[2]: #   y, x, i, dy, dx, g
                    map[y, x] = True

instead of the full form:

  for y, x, i, dy, dx, g in P[2]:
                    map[y, x] = True

It could be done for any of the positions:
for y, _, _, dy, _, g in P[2]: ... etc.

https://stackoverflow.com/questions/9532576/ignore-part-of-a-python-tuple

CogAlg/frame_2D_alg/frame_blobs.py

Line 229 in 1ce8aa2

for y, x, i, dy, dx, g in P[2]:

[boris-kz]

Thanks, I will keep that in mind. Right now it's mostly for "remindability", less clutter than comments. For speed, I plan to move to Julia when it gets too slow anyway.

…

On Wed, Mar 20, 2019 at 7:05 AM Todor Arnaudov ***@***.***> wrote: Do you know that syntax trick? Probably a bit faster, too. If there are elements of a tuple that won't be used, they could be skipped (readability ("remindability") could be preserved with a comment): for y, x, _, _, _, _ in P[2]: # y, x, i, dy, dx, g map[y, x] = True instead of the full form: for y, x, i, dy, dx, g in P[2]: map[y, x] = True It could be done for any of the positions: for y, _, _, dy, _, g in P[2]: ... etc. https://stackoverflow.com/questions/9532576/ignore-part-of-a-python-tuple https://github.com/boris-kz/CogAlg/blob/1ce8aa2c3e4bdcc0259ce2a8c6e83b6a1143a83e/frame_2D_alg/frame_blobs.py#L229 — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#23>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AUAXGcAPV_pzois-Kb1QlGmuo-LPTYv_ks5vYhX1gaJpZM4b_CM4> .