get_node_info fails

[alexey]

self.client = jenkins.Jenkins(JENKINS_URL, username=JENKINS_USER, password=JENKINS_PASSWORD)
ret_nodes = self.client.get_nodes()
print(ret_nodes)

ret_job_ = self.client.get_node_info(ret_nodes[0]["name"])
print(ret_job_)
sys.exit()

Output:

[{'offline': False, 'name': u'master'}]
Traceback (most recent call last):
  File "path/Tools.py", line 22, in <module>
    ret_job_ = self.client.get_node_info(ret_nodes[0]["name"])
  File "/Library/Python/2.7/site-packages/jenkins/__init__.py", line 1465, in get_node_info
    raise JenkinsException('node[%s] does not exist' % name)
jenkins.JenkinsException: node[master] does not exist