12.2.10 Iterators
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.
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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().
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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.
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Prints an indented representation of the content types of the
message object structure. For example:
>>> msg = email.message_from_file(somefile) >>> _structure(msg) multipart/mixed text/plain text/plain multipart/digest message/rfc822 text/plain message/rfc822 text/plain message/rfc822 text/plain message/rfc822 text/plain message/rfc822 text/plain text/plainOptional fp is a file-like object to print the output to. It must be suitable for Python's extended print statement. level is used internally.
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Release 2.4.4c1, documentation updated on 11 October 2006.