[Pyparsing] Dealing with blocks in different order

[mlist @dslextreme.c. <ml...@ds...>]

I have everything I need to parse a file defined, but I am running in to a
problem.  The main part of the file consists of different blocks (see
below) and the blocks can be in different order or not even there. I am not
sure how to deal with this.  For example, it could be

[video block]
[audio block]

or

[audio block]
[video block]

or

[video block]
[audio block]
[audio block]

or any permutation of the above.


Here is the sample text

Track ID 1 soun (Audio) Enabled Not self-contained
   Format soun/aac  48000 Hz aac  FormatFlags: 0x00000000 Bytes/Pkt: 0
Frames/Pkt: 1024 Bytes/Frame: 0 Chan/Frame: 2 Bits/Chan: 0 Reserved:
0x00000000
   ChannelLayout: Stereo (L R)
   Media Timescale: 48000 Duration: 240640/48000  00:00:05.013
MinSampleDuration: 1024/48000 AdvanceDecodeDelta: 0/48000
00:00:00.000
   Num data bytes: 80213 Est. data rate: 127.999 kbps Nominal
framerate: 46.875 fps 235 samples
   Track volume: 1
   Included in auto selection. Language code <und>
   Dimensions: 0 x 0 Track Matrix: 1.0 0.0 0.0 / 0.0 1.0 0.0 / 0.0 0.0 1.0
   1 edit: Media start        0/48000  00:00:00.000 dur     3000/600
00:00:05.000 Track start        0/600  00:00:00.000 dur     3000/600
00:00:05.000

Track ID 2 vide (Video) Enabled Not self-contained
   Format vide/avc1 dimensions: video 1920 x 1080, presentation: 1920
x 1080 (pixelAspect+clean), cleanAperture: 1920 x 1080 @ 0,0
(originTopLeft)
   Media Timescale: 600 Duration: 3003/600  00:00:05.005
MinSampleDuration: 20/600 AdvanceDecodeDelta: 21/600  00:00:00.035
   Num data bytes: 6555892 Est. data rate: 10.479 Mbps Nominal
framerate: 29.970 fps 150 samples
   Frame Reordering Required
   Included in auto selection. Language code <und>
   Dimensions: 1920 x 1080 CleanAperture: 1920 x 1080
ProductionAperture: 1920 x 1080 EncodedPixels: 1920 x 1080 Track
Matrix: 1.0 0.0 0.0 / 0.0 1.0 0.0 / 0.0 0.0 1.0
   1 edit: Media start        0/600  00:00:00.000 dur     3000/600
00:00:05.000 Track start        0/600  00:00:00.000 dur     3000/600
00:00:05.000



And here is what my code looks like:

# Audio Block
self.audio_track_info = Group(
   self.track_id + self.audio_track_format + self.channel_layout +
self.media_timescale +
   self.track_data + self.audio_track_volume + self.included +
   self.audio_track_dimensions +
OneOrMore(self.edits).setResultsName('edits')).setResultsName('audio_track')

# Video Block
self.video_track_info = Group(self.track_id + self.video_track_format
+ self.media_timescale + self.track_data +
                              self.included + self.video_track_dimensions +

OneOrMore(self.edits).setResultsName('edits')).setResultsName('video_track')


self.tracks = Group(ZeroOrMore(self.video_track_info)) +
Group(ZeroOrMore(self.audio_track_info)).setResultsName('tracks')

 I am using parseString on the text and this only returns the audio block
and not the video block.

How do I fix this?