mirror of https://github.com/python/cpython
57 lines
1.7 KiB
Python
57 lines
1.7 KiB
Python
# Copyright (C) 2002 Python Software Foundation
|
||
# Author: barry@zope.com
|
||
|
||
"""Module containing compatibility functions for Python 2.1.
|
||
"""
|
||
|
||
from __future__ import generators
|
||
from __future__ import division
|
||
from cStringIO import StringIO
|
||
from types import StringTypes
|
||
|
||
|
||
|
||
# This function will become a method of the Message class
|
||
def walk(self):
|
||
"""Walk over the message tree, yielding each subpart.
|
||
|
||
The walk is performed in depth-first order. This method is a
|
||
generator.
|
||
"""
|
||
yield self
|
||
if self.is_multipart():
|
||
for subpart in self.get_payload():
|
||
for subsubpart in subpart.walk():
|
||
yield subsubpart
|
||
|
||
|
||
# Python 2.2 spells floor division //
|
||
def _floordiv(i, j):
|
||
"""Do a floor division, i/j."""
|
||
return i // j
|
||
|
||
|
||
|
||
# These two functions are imported into the Iterators.py interface module.
|
||
# The Python 2.2 version uses generators for efficiency.
|
||
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 isinstance(payload, StringTypes):
|
||
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('text') == maintype:
|
||
if subtype is None or subpart.get_subtype('plain') == subtype:
|
||
yield subpart
|