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# Copyright (C) 2001 Python Software Foundation
# Author: barry@zope.com (Barry Warsaw)
"""Various types of useful iterators and generators.
"""
from __future__ import generators
from cStringIO import StringIO
from types import StringType
def body_line_iterator(msg):
"""Iterate over the parts, returning string payloads line-by-line."""
for subpart in msg.walk():
payload = subpart.get_payload()
if type(payload) is StringType:
for line in StringIO(payload):
yield line
def typed_subpart_iterator(msg, maintype='text', subtype=None):
"""Iterate over the subparts with a given MIME type.
Use `maintype' as the main MIME type to match against; this defaults to
"text". Optional `subtype' is the MIME subtype to match against; if
omitted, only the main type is matched.
"""
for subpart in msg.walk():
if subpart.get_main_type() == maintype:
if subtype is None or subpart.get_subtype() == subtype:
yield subpart
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