======================== unified (from filesystem) ========================
                                         'bitrate'  '185.23'
                                        'duration'  '199'
                                          'artist'  ''
                                     'text_people'  'Tom Rowlands, Ed Simons, Tony Butler, Garfield Baker & Byron Smith'
                                         'release'  'C-H-E-M-I-C-A-L (Edit) '
                                           'title'  'C-H-E-M-I-C-A-L (Edit)'
                                           'quals'  ("['Q-OLDST-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-2', "
 "'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-2', 'q-mixbeat-3']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '1'
                                      'tracktotal'  ''
                                            'date'  '2016'
                                        'comments'  ''
                                           'genre'  ''
                                             'bpm'  '114.999'
                                             'key'  '1A'
                                        'acoustid'  ''
rest: ''

======================== rawer (from filesystem) ========================

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     'C-H-E-M-I-C-A-L (Edit) '
'TBPM' (BPM (beats per minute))                     '114.999'
'TCOM' (Composer)                                   'Tom Rowlands, Ed Simons, Tony Butler, Garfield Baker & Byron Smith'
'TCOP' (Copyright message)                          ('℗ 2016 The Chemical Brothers, under exclusive license to Virgin EMI Records, '
 'a division of Universal Music Operations Ltd')
'TDRC' (Recording time)                             '2016'
'TIT2' (Title/songname/content description)         'C-H-E-M-I-C-A-L (Edit)'
'TKEY' (Initial key)                                '1A'
'TPOS' (Part of a set)                              '1/1'
'TRCK' (Track number/Position in set)               '1'
'TSOA' (Album sort order)                           'C-H-E-M-I-C-A-L (Edit) '
'TSOT' (Title sort order)                           'C-H-E-M-I-C-A-L (Edit)'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:purchaseaccount'                              'yaouyh0091013@163.com'
'TXXX:purchasedate'                                 '2016-11-04 02:43:26'
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '3'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '-1.39 dB'
'TXXX:replaygain_track_peak'                        '0.466712'

========================== row from database ==========================
                                              'id'  1307861
                                            'path'  /data/Music/Bulk/00poprockelectronic/Unsorted/[loose files]/01 C-H-E-M-I-C-A-L (Edit).mp3
                                         'working'  None
                                         'bitrate'  185
                                    'duration_sec'  199
                                           'genre'  
                                        'filesize'  4853527
                                           'mtime'  1652397921
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Unsorted [loose files] 01
                                      'tag_artist'  None
                                     'tag_release'  C-H-E-M-I-C-A-L (Edit) 
                                       'tag_title'  C-H-E-M-I-C-A-L (Edit)
                                             'bpm'  114.999
                                    'search_title'  'a':7 'c':1,6 'chemical':9 'e':3 'edit':10,11 'h':2 'i':5 'l':8 'm':4
                                   'search_artist'  None
                                  'search_release'  'a':7 'c':1,6 'chemical':9 'e':3 'edit':10,11 'h':2 'i':5 'l':8 'm':4
                                     'search_rest'  '00poprockelectronic':1 'files':5,6 'loose':3,4 'unsorted':2
                                    'search_combo'  '00poprockelectronic':23 'a':7A,18C 'c':1A,6A,12C,17C 'chemical':9A,20C 'e':3A,14C 'edit':10A,11A,21C,22C 'files':27,28 'h':2A,13C 'i':5A,16C 'l':8A,19C 'loose':25,26 'm':4A,15C 'unsorted':24
                                    'tag_tracknum'  1
                                      'num_images'  1
                                             'key'  1A
                                           'quals'  ['Q-OLDST-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-2', 'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-2', 'q-mixbeat-3']
                                      'lastfmtags'  []
                                        'tag_date'  2016
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1652397921.04393  (2022-05-13 01:25:21)
                             'size'  4853527