Yack is yet another k-mer counter, designed for fast and lightweight counting of short k-mers (up to 31bp).
pip install yack
or install this from the github:
wget https://github.com/arriam-lab2/yack/archive/v0.1.2.tar.gz
tar xzf v0.1.2.tar.gz
rm v0.1.2.tar.gz
cd yack-0.1.2
python setup.py install
yack count -k 25 INPUT_FILE --hist
See examples folder for an example of usage yack as a python module.