I have started coding in Python. Im on ChromeOs with Pycharm. Im getting GPG error while installing flask.Anybody
Tried GOOGLE. tried some commands. No success
root@penguin:/home/singhakj7# The following signatures couldn't be verified because the public key is not available: NO_PUBKEY F57D4F59BD3DF454 Reading package lists... Done W: GPG error: https://download.sublimetext.com apt/stable/ InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY F57D4F59BD3DF454 E: The repository 'https://download.sublimetext.com apt/stable/ InRelease' is not signed. N: Updating from such a repository can't be done securely, and is therefore disabled by default. N: See apt-secure(8) manpage for repository creation and user configuration details.root@penguin:/home/singhakj7# or repository creation and user configuration details.
root@penguin:/home/singhakj7# The following signatures couldn't be verified because the public key is not available: NO_PUBKEY F57D4F59BD3DF454 Reading package lists... Done W: GPG error: https://download.sublimetext.com apt/stable/ InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY F57D4F59BD3DF454 E: The repository 'https://download.sublimetext.com apt/stable/ InRelease' is not signed. N: Updating from such a repository can't be done securely, and is therefore disabled by default. N: See apt-secure(8) manpage for repository creation and user configuration details.root@penguin:/home/singhakj7# or repository creation and user configuration details.