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:mod:`email.iterators`: Iterators --------------------------------- .. module:: email.iterators :synopsis: Iterate over a message object tree. Iterating over a message object tree is fairly easy with the :meth:`Message.walk` method. The :mod:`email.iterators` module provides some useful higher level iterations over message object trees. .. function:: 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 :meth:`readline`, skipping over all the intervening headers. Optional *decode* is passed through to :meth:`Message.get_payload`. .. function:: 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 :mimetype:`text`. Thus, by default :func:`typed_subpart_iterator` returns each subpart that has a MIME type of :mimetype:`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. .. function:: _structure(msg[, fp[, level]]) 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/plain Optional *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.