[web2py] PGP Mail Confusion

[horridohobbyist]

I'm new to python and web2py. I'm studying the official web2py book.
In Chapter 8, there is a reference to PGP mail using the gpgme
module...

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It is possible to send PGP encrypted emails using the following
settings:

1. from gpgme import pgp
2. mail.settings.cipher_type = 'gpg'
3. mail.settings.sign = True
4. mail.settings.sign_passphrase = 'your passphrase'
5. mail.settings.encrypt = True

The latter requires the python-pyme package.
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However, I get this error:

"ImportError: No module named gpgme"

So how do I get this module? Please give details, and remember: I'm a
newbie.

Thanks.