how to make stream demux block in python

Hi everyone, 

Can anyone tell me how to make a stream demuxing block to demultiplex one stream into N output streams?

Demuxes a stream producing N outputs streams that contain n_0 items in the first stream, n_1 items in the second, etc., and repeats. Tags are propagated. The number of items in each output stream is specified using the lengths parameter like so [n_0, n_1, ..., n_N-1].

Example:
lengths = [2,3,4,5]

input stream = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, ...]
output_stream_0 = [0, 1, 14, 15, ...]
output_stream_1 = [2, 3, 4, 16, ...]
output_stream_2 = [5, 6, 7, 8, ...]

output_stream_2 = [9, 10, 11, 12, 13 ...]

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Thanks & Regards,
Sumit Kumar Agrawal
Ph.D. (Electrical Engineering)
Indian Institute of Technology
Jodhpur, Rajasthan-342037

Mob. No.- 8410957412

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