gplaycli software package provides Google Play downloader command line interface, you can install in your Debian 9 (Stretch) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install gplaycli
gplaycli is installed in your system.
Make ensure the gplaycli package were installed using the commands given below,
$ sudo dpkg-query -l | grep gplaycli *
You will get with gplaycli package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Utilities |
| Package | gplaycli |
| Version | 0.1.2+git15~g20f65ca-1 |
| Description | Google Play downloader command line interface |
| Sub Section | Utils |