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https://www.juniper.net/documentation/en_US/junos-pyez/topics/task/program/junos-pyez-program-device-connecting.html



https://github.com/dahai0013/Basic-python-with-Juniper/tree/master/python



change system message
system message
labuser@saltsackmaster:~/project/python_script$ more chg_system_message.py
from jnpr.junos import Device
from jnpr.junos.utils.config import Config
from pprint import pprint

junos_hosts = [ '172.30.95.177' ]

for ip in junos_hosts:

    ## open session with juniper divice
    dev = Device(host=ip, user='Netbox', password='Netbox')
    dev.open()

    ## Add or bound the configuration instance variable to the dev instan
    dev.bind(cu=Config)

    ## change config
    cmd_chg_hostname='set system login message "test jlk from python"'
    result = dev.cu.load(cmd_chg_hostname,format='set')
    pprint (result)
    dev.cu.pdiff()

    ## commit changes
    dev.cu.commit()

    ## close the session
    dev.close()



facts with pyez 
import sys
import json
import yaml
from pprint import pprint
from jnpr.junos import Device
from jnpr.junos.exception import ConnectError

dev = Device(host='192.168.99.11',user='ansible',passwd='ansible123')
try:
    dev.open()
except ConnectError as err:
    print ("Cannot connect to device: {0}".format(err))
    sys.exit(1)

#print("#print everything\n")
#pprint (dev.facts)

#print("\n#print only the version")
#pprint (dev.facts['version'])

print (yaml.dump(dev.facts))

#print (json.dumps(dev.facts))

dev.close()



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