email.utils ：杂项实用程序
email.utils
email
email.iterators
源代码： Lib/email/iterators.py
Iterating over a message object tree is fairly easy with the Message.walk 方法。 email.iterators module provides some useful higher level iterations over message object trees.
Message.walk
This iterates over all the payloads in all the subparts of msg , returning the string payloads line-by-line. It skips over all the subpart headers, and it skips over any subpart with a payload that isn’t a Python string. This is somewhat equivalent to reading the flat text representation of the message from a file using readline() , skipping over all the intervening headers.
readline()
可选 decode 被传递给 Message.get_payload .
Message.get_payload
This iterates over all the subparts of msg , returning only those subparts that match the MIME type specified by maintype and subtype .
注意， subtype is optional; if omitted, then subpart MIME type matching is done only with the main type. maintype is optional too; it defaults to text .
因此，默认情况下 typed_subpart_iterator() returns each subpart that has a MIME type of text/* .
typed_subpart_iterator()
The following function has been added as a useful debugging tool. It should not be considered part of the supported public interface for the package.
Prints an indented representation of the content types of the message object structure. For example:
>>> msg = email.message_from_file(somefile) >>> _structure(msg) multipart/mixed text/plain text/plain multipart/digest message/rfc822 text/plain message/rfc822 text/plain message/rfc822 text/plain message/rfc822 text/plain message/rfc822 text/plain text/plain
可选 fp is a file-like object to print the output to. It must be suitable for Python’s print() 函数。 level is used internally. include_default , if true, prints the default type as well.
print()
json — JSON 编码器和解码器
json
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