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modified for new user data schema and one clip playlist cases

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pythagoraswitch 2018-08-03 00:06:49 +02:00
parent 71a9effbba
commit b7eeb0bd95
1 changed files with 43 additions and 48 deletions
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91
recommendation_engine.py
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@ -96,21 +96,21 @@ class Engine:
# Make sure sanity check exists in front-end (error if it does not add up to 16). # Make sure sanity check exists in front-end (error if it does not add up to 16).
video_num = nc + np + ns video_num = nc + np + ns
for event in user.get('events', []):
if event.get('event') == "grid" and event.get('data').get('index') not in grid_events:
grid_events[event.get('data').get('index')] = event.get('data')
if len(grid_events) == video_num:
break
# # The version where the loop also extract play_index (requires "index" in play event data):
# play_index = None
# for event in user.get('events', []): # for event in user.get('events', []):
# if event.get('event') == "grid" and event.get('data').get('index') not in grid_events: # if event.get('event') == "grid" and event.get('data').get('index') not in grid_events:
# grid_events[event.get('data').get('index')] = event.get('data') # grid_events[event.get('data').get('index')] = event.get('data')
# if event.get('event') == "play" and not play_index: # if len(grid_events) == video_num:
# play_index = event.get('data').get('index') # break
# if len(grid_events) == video_num and play_index:
# break # # The version where the loop also extract play_index (requires "index" in play event data):
play_index = None
for event in user.get('events', []):
if event.get('event') == "grid" and event.get('data').get('index') not in grid_events:
grid_events[event.get('data').get('index')] = event.get('data')
if event.get('event') == "play" and not play_index:
play_index = event.get('data').get('index')
if len(grid_events) == video_num and play_index:
break
prev_grid_list = sorted([v for v in grid_events.values()], key=lambda k:k['index']) prev_grid_list = sorted([v for v in grid_events.values()], key=lambda k:k['index'])
@ -119,50 +119,45 @@ class Engine:
return self.get_recommendations(user) return self.get_recommendations(user)
else: else:
# Once the "index" is added to play event data, played index will be excluded from the random shuffle # played index is excluded from the random shuffle and deterministically added to staySame pool.
# and deterministically added to staySame pool. video_indx = [*range(play_index)]+[*range(play_index+1,video_num)]
# video_indx = list(range(video_num))
# video_indx = [*range(playIndex)]+[*range(playIndex+1,video_num)]
video_indx = list(range(video_num))
random.shuffle(video_indx) random.shuffle(video_indx)
video_indx.append(play_index)
next_clip_index = video_indx[:nc]
next_playlist_index = video_indx[nc:nc+np]
stay_same_index = video_indx[nc+np:]
rec_list = [] rec_list = []
# For now, randomly choose a clip in the same playlist instead of switching to the next clip. # select next clip for nextClip pool except when the playlist has only one clip.
# This will be changed once the clip position is tracked in the user data as "playlistPostion" for i in next_clip_index:
for i in video_indx[:nc]: for playlist in self.playlists:
if prev_grid_list[i].get('playlist') is None: if playlist.get('name')== prev_grid_list[i].get('playlist'):
# add this to deal with the absence of "playlist" data in a grid event temporarily. if len(playlist["clips"]) == 1:
# If there's no playlist data recorded, add the nextClip pool to nextPlaylist pool for now. next_playlist_index.append(i)
np += nc break
nc = 0 # Discuss how this behavour should be: should it switch to a new playlist if it is the end of the playlist clip sequence already?
break elif prev_grid_list[i].get('playlistPosition') + 1 == len(playlist['clips']):
else: playlist_pos = 0
# if "playlist" and "playlistPostion" data exists in grid event (it should be in the future) else:
for playlist in playlists: playlist_pos = prev_grid_list[i].get('playlistPosition') + 1
if playlist.get('name')== prev_grid_list[i].get('playlist'):
# Discuss how this behavour should be: should it switch to a new playlist if it is the end of the playlist clip sequence already? rec_list.append((i, {
# if prev_grid_list[i].get('index') == len(playlist['clips']): 'clips': playlist['clips'],
# playlist_pos = 0 # 'position': random.randrange(len(playlist['clips'])),
# else: 'position': playlist_pos,
# playlist_pos = prev_grid_list[i].get('index') + 1 'name': playlist['name'],
'tags': playlist['tags'],
rec_list.append((i, { }))
'clips': playlist['clips'],
'position': random.randrange(len(playlist['clips'])),
# 'position': playlist_pos,
'name': playlist['name'],
'tags': playlist['tags'],
}))
# randomly select playlists (excluding the playlists from the current grid once "playlist" is recorded for grid events) # randomly select playlists (excluding the playlists from the current grid once "playlist" is recorded for grid events)
# for nextPlaylist pool. # for nextPlaylist pool.
vids_exclude = [] vids_exclude = [e.get("playlist") for e in prev_grid_list]
# vids_exclude = [e.get("playlist") for e in prev_grid_list]
video = self.get_recommendations(user, vids_exclude) video = self.get_recommendations(user, vids_exclude)
rec_list += [(i, video[i]) for i in video_indx[nc:nc+np]] rec_list += [(i, video[i]) for i in next_playlist_index]
#staySame pool #staySame pool
# video_indx.append(playIndex) rec_list += [(i,{}) for i in stay_same_index]
rec_list += [(i,{}) for i in video_indx[nc+np:]]
rec_list = sorted(rec_list, key=lambda k:k[0]) rec_list = sorted(rec_list, key=lambda k:k[0])
return [e[1] for e in rec_list] return [e[1] for e in rec_list]