# Copyright (C) 2001-2006 Python Software Foundation# Author: Barry Warsaw# Contact: email-sig@python.org"""Various types of useful iterators and generators."""__all__ = [ 'body_line_iterator', 'typed_subpart_iterator', 'walk', # Do not include _structure() since it's part of the debugging API. ]import sysfrom cStringIO import StringIO# This function will become a method of the Message classdef 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# These two functions are imported into the Iterators.py interface module.def body_line_iterator(msg, decode=False): """Iterate over the parts, returning string payloads line-by-line. Optional decode (default False) is passed through to .get_payload(). """ for subpart in msg.walk(): payload = subpart.get_payload(decode=decode) if isinstance(payload, basestring): for line in StringIO(payload): yield linedef 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_content_maintype() == maintype: if subtype is None or subpart.get_content_subtype() == subtype: yield subpartdef _structure(msg, fp=None, level=0, include_default=False): """A handy debugging aid""" if fp is None: fp = sys.stdout tab = ' ' * (level * 4) print >> fp, tab + msg.get_content_type(), if include_default: print >> fp, '[%s]' % msg.get_default_type() else: print >> fp if msg.is_multipart(): for subpart in msg.get_payload(): _structure(subpart, fp, level+1, include_default)
# Copyright (C) 2001-2006 Python Software Foundation
# Author: Barry Warsaw
# Contact: email-sig@python.org
"""Various types of useful iterators and generators."""
__all__ = [
'body_line_iterator',
'typed_subpart_iterator',
'walk',
# Do not include _structure() since it's part of the debugging API.
]
import sys
from cStringIO import StringIO
# 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
# These two functions are imported into the Iterators.py interface module.
def body_line_iterator(msg, decode=False):
"""Iterate over the parts, returning string payloads line-by-line.
Optional decode (default False) is passed through to .get_payload().
"""
for subpart in msg.walk():
payload = subpart.get_payload(decode=decode)
if isinstance(payload, basestring):
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_content_maintype() == maintype:
if subtype is None or subpart.get_content_subtype() == subtype:
yield subpart
def _structure(msg, fp=None, level=0, include_default=False):
"""A handy debugging aid"""
if fp is None:
fp = sys.stdout
tab = ' ' * (level * 4)
print >> fp, tab + msg.get_content_type(),
if include_default:
print >> fp, '[%s]' % msg.get_default_type()
else:
print >> fp
if msg.is_multipart():
for subpart in msg.get_payload():
_structure(subpart, fp, level+1, include_default)