Usage

The script accepts input from either the command line or stdin

python3 ./calcheck.py email1 email2 ... emailn

or

python3 ./calcheck.py < emails_file.txt

Emails which exist on the google platform are printed to stdout Emails with public calendars are followed by a *

Output is written to stdout, one email per row

Inspired by https://github.com/d0rb (https://gist.github.com/d0rb/ed96de8bffc56f7cf40fb8cc06c4c07a?permalink_comment_id=4994908#gistcomment-4994908)