57 lines
1.7 KiB
Python
57 lines
1.7 KiB
Python
# Copyright (C) 2002 Python Software Foundation
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# Author: barry@zope.com
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"""Module containing compatibility functions for Python 2.1.
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"""
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from __future__ import generators
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from __future__ import division
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from cStringIO import StringIO
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from types import StringTypes
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# This function will become a method of the Message class
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def walk(self):
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"""Walk over the message tree, yielding each subpart.
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The walk is performed in depth-first order. This method is a
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generator.
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"""
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yield self
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if self.is_multipart():
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for subpart in self.get_payload():
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for subsubpart in subpart.walk():
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yield subsubpart
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# Python 2.2 spells floor division //
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def _floordiv(i, j):
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"""Do a floor division, i/j."""
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return i // j
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# These two functions are imported into the Iterators.py interface module.
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# The Python 2.2 version uses generators for efficiency.
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def body_line_iterator(msg):
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"""Iterate over the parts, returning string payloads line-by-line."""
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for subpart in msg.walk():
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payload = subpart.get_payload()
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if isinstance(payload, StringTypes):
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for line in StringIO(payload):
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yield line
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def typed_subpart_iterator(msg, maintype='text', subtype=None):
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"""Iterate over the subparts with a given MIME type.
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Use `maintype' as the main MIME type to match against; this defaults to
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"text". Optional `subtype' is the MIME subtype to match against; if
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omitted, only the main type is matched.
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"""
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for subpart in msg.walk():
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if subpart.get_main_type('text') == maintype:
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if subtype is None or subpart.get_subtype('plain') == subtype:
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yield subpart
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