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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 upload_from_file(self, filename):
 """ Upload a local file to Gfycat """

        key = str(uuid.uuid4())[:8]

        form = [('key', key),
                ('acl', ACL),
                ('AWSAccessKeyId', AWS_ACCESS_KEY_ID),
                ('success_action_status', SUCCESS_ACTION_STATUS),
                ('signature', SIGNATURE),
                ('Content-Type', CONTENT_TYPE),
                ('policy', POLICY)]
        data = dict(form)

        files = {'file': open(filename, 'rb')}
        r = requests.post(FILE_UPLOAD_ENDPOINT, data=data, files=files)

        if r.status_code != 200:
            raise GfycatClientError('Error uploading the GIF', r.status_code)

        info = self.uploaded_file_info(key)
        while 'timeout' in info.get('error', '').lower():
            time.sleep(2)
            info = self.uploaded_file_info(key)
        if 'error' in info:
            raise GfycatClientError(info['error'])

        return info