Document

PHP File Manager

OS: Linux p3plzcpnl507578.prod.phx3.secureserver.net 4.18.0-553.141.2.lve.el8.x86_64 #1 SMP Wed Jul 8 16:10:02 UTC 2026 x86_64

Directory: /usr/lib64/python3.12/email/

Command | New File | New Dir

File: iterators.py

# 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 io 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():
            yield from subpart.walk()

# 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, str):
            yield from StringIO(payload)

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(tab + msg.get_content_type(), end='', file=fp)
    if include_default:
        print(' [%s]' % msg.get_default_type(), file=fp)
    else:
        print(file=fp)
    if msg.is_multipart():
        for subpart in msg.get_payload():
            _structure(subpart, fp, level+1, include_default)

Name	Size	Permissions	Options
mime	--	rwxr-xr-x	Rename \| Chmod \| Delete
__pycache__	--	rwxr-xr-x	Rename \| Chmod \| Delete
architecture.rst	9561 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
base64mime.py	3551 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
charset.py	17063 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
contentmanager.py	10588 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
encoders.py	1778 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
errors.py	3814 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
feedparser.py	22796 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
generator.py	21403 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
header.py	24092 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
headerregistry.py	20819 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
iterators.py	2129 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
message.py	48396 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
parser.py	4975 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
policy.py	10614 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
quoprimime.py	9864 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
utils.py	16071 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
_encoded_words.py	8541 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
_header_value_parser.py	111685 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
_parseaddr.py	17821 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
_policybase.py	15535 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
__init__.py	1764 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete