impala连接hive遇到的问题

from impala.dbapiimport connect

# 需要注意的是这里的auth_mechanism必须有，但database不必须

conn = connect(host='172.26.136.230', port=10000 ,auth_mechanism='PLAIN')

cur = conn.cursor()

cur.execute('SHOW DATABASES')

print(cur.fetchall())

cur.execute('SHOW Tables')

print(cur.fetchall())

cur.close()

conn.close()