Iterating over a message object tree is fairly easy with the
Message.walk() method. The email.Iterators module
provides some useful higher level iterations over message object
trees.
body_line_iterator(
msg[, decode])
This iterates over all the payloads in all the subparts of msg,
returning the string payloads line-by-line. It skips over all the
subpart headers, and it skips over any subpart with a payload that
isn't a Python string. This is somewhat equivalent to reading the
flat text representation of the message from a file using
readline(), skipping over all the intervening headers.
Optional decode is passed through to Message.get_payload().
typed_subpart_iterator(
msg[,
maintype[, subtype]])
This iterates over all the subparts of msg, returning only those
subparts that match the MIME type specified by maintype and
subtype.
Note that subtype is optional; if omitted, then subpart MIME
type matching is done only with the main type. maintype is
optional too; it defaults to text.
Thus, by default typed_subpart_iterator() returns each
subpart that has a MIME type of text/*.
The following function has been added as a useful debugging tool. It
should not be considered part of the supported public interface
for the package.
_structure(
msg[, fp[, level]])
Prints an indented representation of the content types of the
message object structure. For example:
