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Change rating calculation system to have good avg

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Maxence G. de Montauzan
2017-04-18 01:49:32 +02:00
parent bf3682bd00
commit 9429aca981
1 changed files with 18 additions and 8 deletions
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26
iTunesParser.py
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@@ -136,19 +136,22 @@ class ITunesParser:
# Add artist # Add artist
if akey not in self._artists: if akey not in self._artists:
self._artists[akey] = { self._artists[akey] = {
'id': len(self._artists), 'id': len(self._artists), # TODO Calc an uniq ID (permit to replace data)
'name': akey, 'name': akey,
'count': 0, 'plays': 0, 'rating': 0, 'count': 0, 'plays': 0, 'rating': 0,
# TODO Use Rating with R upper case to be coherent with iTunes data
'genres': set() 'genres': set()
} }
# Compute information # Compute information
rating = (track['Rating'] // 20) if 'Rating' in track else 0 rating = track['Rating'] if 'Rating' in track else 0
# TODO Improve rating that currently can go ahead to 100 # TODO If no Rating, don't take 0
plays = track['Play Count'] if 'Play Count' in track else 0 plays = track['Play Count'] if 'Play Count' in track else 0
rating = self._calc_rating(rating, self._artists[akey]['rating'], self._artists[akey]['count'])
self._artists[akey]['count'] += 1 self._artists[akey]['count'] += 1
self._artists[akey]['rating'] += rating self._artists[akey]['rating'] = rating
self._artists[akey]['plays'] += plays self._artists[akey]['plays'] += plays
if 'Genre' not in track: if 'Genre' not in track:
@@ -172,18 +175,22 @@ class ITunesParser:
self._albums[akey] = { self._albums[akey] = {
'id': len(self._albums), 'id': len(self._albums),
'name': akey, 'name': akey,
'count': 0, 'plays': 0, 'rating': 0, 'count': 0, 'plays': 0, 'rating': 0,
# TODO Use Rating with R upper case to be coherent with iTunes data
'genres': set(), 'genres': set(),
'artist': set() 'artist': set()
} }
# Compute information # Compute information
rating = (track['Rating'] // 20) if 'Rating' in track else 0 rating = track['Rating'] if 'Rating' in track else 0
# TODO Use Album Rating
# TODO If no Rating, don't take 0
plays = track['Play Count'] if 'Play Count' in track else 0 plays = track['Play Count'] if 'Play Count' in track else 0
rating = self._calc_rating(rating, self._albums[akey]['rating'], self._albums[akey]['count'])
self._albums[akey]['count'] += 1 self._albums[akey]['count'] += 1
self._albums[akey]['rating'] += rating self._albums[akey]['rating'] = rating
# TODO Improve rating that currently can go ahead to 100
self._albums[akey]['plays'] += plays self._albums[akey]['plays'] += plays
if 'Genre' not in track: if 'Genre' not in track:
@@ -231,6 +238,9 @@ class ITunesParser:
file_albums.write(bytes("\n", 'UTF-8')) file_albums.write(bytes("\n", 'UTF-8'))
file_albums.close() file_albums.close()
def _calc_rating(self, added_value, current_rating, count):
return (current_rating * count + added_value) // (count + 1)
#### main block #### #### main block ####
# Default input & output files # Default input & output files