kaldi-io-for-python

``Glue'' code connecting kaldi data and python.

Supported data types

vector (integer)
Vector (float, double)
Matrix (float, double)
Posterior (posteriors, nnet1 training targets, confusion networks, ...)

Examples

Reading feature scp example:

import kaldi_iofor key,mat in kaldi_io.read_mat_scp(file):  ...

Writing feature ark to file/stream:

import kaldi_iowith open(ark_file,'wb') as f:  for key,mat in dict.iteritems(): 
    kaldi_io.write_mat(f, mat, key=key)

Writing features as 'ark,scp' by pipeline with 'copy-feats':

import kaldi_io
ark_scp_output='ark:| copy-feats --compress=true ark:- ark,scp:data/feats2.ark,data/feats2.scp'with kaldi_io.open_or_fd(ark_scp_output,'wb') as f:  for key,mat in dict.iteritems(): 
    kaldi_io.write_mat(f, mat, key=key)

Install

from pypi: python -m pip --user install kaldi_io
from sources:

git clone https://github.com/vesis84/kaldi-io-for-python.git <kaldi-io-dir>
python setup.py install (default python)

for local development use: export PYTHONPATH=${PYTHONPATH}:<kaldi-io-dir> in $HOME/.bashrc

Note: it is recommended to set $KALDI_ROOT in your $HOME/.bashrc asexport KALDI_ROOT=<some_kaldi_dir>, so you can read/write using pipes which contain kaldi binaries.