$ cd /home
$ sudo snap install pycharm-community --classic
$ pycharm-community
Jan 02, 2018 12:17:45 AM java.util.prefs.FileSystemPreferences$1 run
INFO: Created user preferences directory.
Jan 02, 2018 12:17:45 AM java.util.prefs.FileSystemPreferences$6 run
Eu usei cd /home
then sudo snap install pycharm-community --classic
então apenas digite python-community
e funcionou.