email — An email and MIME handling package

Source code: Lib/email/__init__.py

json — JSON encoder and decoder

Source code: Lib/json/__init__.py

mailcap — Mailcap file handling

Source code: Lib/mailcap.py

mailbox — Manipulate mailboxes in various formats

Source code: Lib/mailbox.py

mimetypes — Map filenames to MIME types

Source code: Lib/mimetypes.py

base64 — Base16, Base32, Base64, Base85 Data Encodings

Source code: Lib/base64.py

binhex — Encode and decode binhex4 files

Source code: Lib/binhex.py

binascii — Convert between binary and ASCII

The binascii module contains a number of methods to convert between binary and various ASCII-encoded binary representations. Normally, you will not use these functions directly but use wrapper modules like uu, base64, or binhex instead. The binascii module contains low-level functions written in C for greater speed that are used by the higher-level modules.

quopri — Encode and decode MIME quoted-printable data

Source code: Lib/quopri.py

uu — Encode and decode uuencode files

Source code: Lib/uu.py