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class email.headerregistry.Group(display_name=None, addresses=None) The class used to represent an address group. The general

binascii.crc32(data[, value]) Compute CRC-32, the 32-bit checksum of data, starting with an initial CRC of value

mimetypes.read_mime_types(filename) Load the type map given in the file filename, if it exists. The type map is returned

set_labels(labels) Set the list of labels on the message to labels.

MimeTypes.read(filename, strict=True) Load MIME information from a file named filename. This uses readfp()

__setitem__(key, message) Replace the message corresponding to key with message. Raise a

values() Return a list of all the message’s field values.

get_content_charset(failobj=None) Return the charset parameter of the Content-Type

unlock() Three locking mechanisms are used—dot locking and, if available, the flock() and lockf()