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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_account_cos(self, account):
 """ Fetch the cos for a given account Quite different from the original request which returns COS + various through get_account. :type account: zobjects.Account :rtype: zobjects.COS """

        resp = self.request(
            'GetAccountInfo', {'account': account.to_selector()})
        return zobjects.COS.from_dict(resp['cos'])