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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_orgs(self, number=-1, etag=None):
 """Iterate over organizations the user is member of :param int number: (optional), number of organizations to return. Default: -1 returns all available organization :param str etag: (optional), ETag from a previous request to the same endpoint :returns: list of :class:`Event <github3.orgs.Organization>`\ s """

        # Import here, because a toplevel import causes an import loop
        from .orgs import Organization
        url = self._build_url('orgs', base_url=self._api)
        return self._iter(int(number), url, Organization, etag=etag)