* fixed FileNotFoundError when directory isn't writable (#1640)
- when using docker, if `user_data_dir()` isn't writable directory,
`default_data_dir()` use `system temp directory` + `virtualenv`.
for example, tempdir is `/tmp`, it use `/tmp/virtualenv`
* start making the app-data more explicit and robust
Signed-off-by: Bernat Gabor <bgabor8@bloomberg.net>
* fix Windows
* fix docs
Signed-off-by: Bernat Gabor <bgabor8@bloomberg.net>
Co-authored-by: Bernát Gábor <gaborjbernat@gmail.com>
