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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 iter_emails(self, number=-1, etag=None):
 """Iterate over email addresses for the authenticated user. :param int number: (optional), number of email addresses to return. Default: -1 returns all available email addresses :param str etag: (optional), ETag from a previous request to the same endpoint :returns: generator of dicts """

        url = self._build_url('user', 'emails')
        return self._iter(int(number), url, dict, etag=etag)