How to use

(optional) virtualenv

virtualenv venv
source venv/bin/activate

install dependency

pip install openpyxl

split xlsx

e.g. split ~/Downloads/large.xlsx into 200 files, splitted files are stored nearby original file, within a new directory, ~/Downloads/large-splitted

python splitxl.py ~/Downloads/large.xlsx 200

merge xlsx

python mergexl.py /path/to/dir/contains/xlsx