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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get_body(self):
 """Get the body of the email message"""


        if self.is_multipart():
            # get the plain text version only
            text_parts = [part
                          for part in typed_subpart_iterator(self,
                                                             'text',
                                                             'plain')]
            body = []
            for part in text_parts:
                charset = get_charset(part, get_charset(self))
                body.append(unicode(part.get_payload(decode=True),
                                    charset,
                                    "replace"))

            return u"\n".join(body).strip()

        else:   # if it is not multipart, the payload will be a string
                # representing the message body
            body = unicode(self.get_payload(decode=True),
                           get_charset(self),
                           "replace")
            return body.strip()