pip cache will show how much space is taken from past download
(nostr) ever3st@Alashazam:~/Documents/dev/python/$ pip cache info
Package index page cache location: /home/ever3st/.cache/pip/http
Package index page cache size: 2437.7 MB
Number of HTTP files: 271
Wheels location: /home/ever3st/.cache/pip/wheels
Wheels size: 2.2 MB
Number of wheels: 2
About 2GB if space is needed it can be cleared
(nostr) ever3st@Alashazam:~/Documents/dev/python/$ pip cache purge
Files removed: 273
(nostr) ever3st@Alashazam:~/Documents/dev/python/bots/nostr$ pip cache info
Package index page cache location: /home/ever3st/.cache/pip/http
Package index page cache size: 0 bytes
Number of HTTP files: 0
Wheels location: /home/ever3st/.cache/pip/wheels
Wheels size: 326 bytes
Number of wheels: 0