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8 2 , - ,10 8 8 8 1 0 0 $ python3 sample_print.py Hello JANOG! A C A C HI print("Hello JANOG!") 1. A C HI 


 = C 9 8A ., . 8 = -= A9= 9 a = 1 # a: int  b = 1.1 # b: float  print(a) print(b) print(‘-----’) c = a + b # c: float  print(c) $ python3 sample_number.py 1 1.1 ----- 2.1 I H I H O 0 S1 T U (Cint a;float b;)"
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 A= - . - , 8 = 2 router_list = ["router_A", "router_B", "router_C"] #   print(router_list) # 0
1 print(router_list[1]) #  (len) print(len(router_list)) $ python3 sample_list.py ['router_A', 'router_B', 'router_C'] router_B 3 2 8 18 A H I O 0 C 0 


 = C 8A ., . 8 = -=: A = $ python3 sample_dictionary.py router_A 15.1 O S 0 1 TU I I H #
key
value  router_info = { "hostname" : "router_A", "os" : "junos", "version" : "15.1", } #   print(router_info["hostname"]) #   print(router_info["version"]) : 2 A = C C 

A . .32 - 8 3 21 2 $ python3 sample_if.py num is two num = 2 if num == 1: print("num is one") elif num == 2: print("num is two") else: print("num is the others") 1 830 A U T c ,A PCmU T Tai 21 3 PleH _ f O gI Ch Sfn 

34 ., .2148 - 8 2 10 81 H IA C O U #  
 
  router_list = [”router_A”, ”router_B”] # router_list
 router_name  for router_name in router_list: print(router_name) $ python3 sample_for_2.py router_A router_B # 
 
  # range(3) = 0,1,2  for num in range(3): print(num) $ python3 sample_for_1.py 0 1 2 H IA TS O U sample_for_1.py sample_for_2.py 


 C HA A C A # 
:"r" file1 = open("sample_read.txt", "r") text = file1.read() #  ! print(text) file1.close() # 
:"w", 
:"a" file2 = open("sample_write.txt", "w") file2.write("Good!") file2.close() $ python3 sample_file.py Hello JANOG! from sample_read.txt How are you feeling? sample_file.py   [  : sample_read.txt] Hello JANOG! from sample_read.txt How are you feeling? [  : sample_write.txt] Good! C HA A C A 8 2 - . -10 8 ,85 8 1 0 0 


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  A C A C HI #  ! # $
# OS show bgp summary# def get_show_bgp_summary(router_info): if router_info["os"] == "junos": command = "show bgp summary" elif router_info['os'] == 'ios': command = "show ip bgp summary" else: command = “N/A” return command # " router_info = { "hostname" : "router_A", "os" : "junos" } # router_info 
  command = get_show_bgp_summary(router_info) print(command) $ python3 sample_function.py show bgp summary sample_function.py 8 2 - . -10 78 ,8 87 1 0 70 


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  89 2 - . -10 8 ,8 8 1 0 0 class Router: # &+$: '#% "+$
def __init__(self, hostname, os, version): #  $:  ( $
self.hostname = hostname self.os = os self.version = version # show bgp summary*
def get_show_bgp_summary(self): if self.os == "junos": command = "show bgp summary" elif self.os == 'ios': command = "show ip bgp summary" else: command = 'N/A’ return command # Router'# router_A = Router(hostname="router_A", os="junos", version="15.1") router_B = Router(hostname="router_B", os="ios", version="15.7(3)M") #  Router !)+$  print(router_A.hostname) command = router_A.get_show_bgp_summary() print(command) print(router_B.hostname) command = router_B.get_show_bgp_summary() print(command) $ python3.6 sample_class.py router_A show bgp summary router_B show ip bgp summary A C A C HI sample_class.py 

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A ( , - 0 32 . 8 ) 3 21 , 2 $ pip3 list Jinja2 (2.9.6) . . . $ pip3 install jinja2 S H HOI C 1 H HOI C HOI C T H U (
) *&
venvvirtualenv",* # pip %'( ($+)! ) https://docs.python.jp/3/library/venv.html 

$ pip --version pip 9.0.1 from /Library/Frameworks/Python.framework/Versions /2.7/lib/python2.7/site-packages (python 2.7) $ pip2 --version pip 9.0.1 from /Library/Frameworks/Python.framework/Versions /2.7/lib/python2.7/site-packages (python 2.7) $ pip3 --version pip 9.0.1 from /Library/Frameworks/Python.framework/Versions /3.6/lib/python3.6/site-packages (python 3.6) l U ac n, 8 ac ph -r S PC A A A AO c H sm gI Ue T (
) : pip 
 Python setuptools  pip http://www.lifewithpython.com/2012/11/Python-package-setuptools-pip.html 8 c ito 3 . .21 8 - 8 2 10 81 


 4 A ., .31 - 83 10 1 # datetime   
 import datetime # datetime  
datetime now now = datetime.datetime.now() print(now) $ python3 sample_library.py 2017-11-15 14:25:56.360603 sample_library.py   20 3 83H HI C O 

 A M ) I L 5 ) 5 3( L I P ) : JSON
https://thinkit.co.jp/article/70/1 

 ( 8 ) -30 , 3 6 2 C A 6 - 6 [ { "router_name": "Router_A", "ip": "192.168.0.1", "os": "junos" }, { "router_name": "Router_B", "ip": "192.168.0.2", "os": "ios" }, { "router_name": "Router_C", "ip": "192.168.0.3", "os": "iosxr" } ] $ python3 sample_json.py [{'router_name': 'Router_A', 'ip': '192.168.0.1', 'os': 'junos'}, {'router_name': 'Router_B', 'ip': '192.168.0.2', 'os': 'ios'}, {'router_name': 'Router_C', 'ip': '192.168.0.3', 'os': 'iosxr'}] ----- 192.168.0.1 .20 c S HN OJ N TU .A S P P 1 h HNe O ag iIJ U g h sample_json.json   import json file = open("sample_json.json", "r") # file  json
 routers_list = json.load(file) print(routers_list) print(”-----") print(routers_list[0]["ip"]) sample_json.py 

 
   J J a 7 J P ) J 37 )( 2

{{ title }}

{{ body }}

title = “Web page 1” body = “Hello! World!” {{  }} :  {% if  %} : if {% endif %} {% for  in  %} : for {% endfor %} {# #} :   [
(Jinja2)] HTML   
 

 
   ( C ( ,0. 1 0 3 A ) 32 , 3 interface {{ if_name }} description {{ if_description }} ip address {{ ip4 }} {{ ip4_subnet }} duplex auto speed auto no shutdown ! H O IJ - 82 UT import jinja2 # ! file = open("sample_template.jinja2", "r") template_txt = file.read() # 
   template = \ jinja2.Environment().from_string(template_txt) # 
 " config_txt = template.render( if_description="To_RouterA", if_name="fastethernet 1/1", ip4=“192.168.0.1”, ip4_subnet="255.255.255.0") print(config_txt) $ python3 sample_template_1.py interface fastethernet 1/1 description To_RouterA ip address 192.168.0.1 255.255.255.0 duplex auto speed auto no shutdown ! sample_template.jinja2 sample_template_1.py S  

( ( ( ) interface {{ if_name }} description {{ if_description }} ip address {{ ip4 }} {{ ip4_subnet }} duplex auto speed auto no shutdown ! 3( ) 2 interfaces = [ { "if_description" : "To_RouterA", "if_name" : "fastethernet 1/1", "ip4” : "192.168.0.1", "ip4_subnet” : "255.255.255.0" }, { "if_description" : "To_RouterB", "if_name" : "fastethernet 1/2", "ip4" : "192.168.1.1", "ip4_subnet" : "255.255.255.0" }, { "if_description" : "To_RouterC", "if_name" : "fastethernet 1/3”, "ip4" : "192.168.2.1", "ip4_subnet" : "255.255.255.0" } ] for interface in interfaces: config_txt = template.render(interface) print(config_txt) $ python3 sample_template_2.py interface fastethernet 1/1 description To_RouterA ip address 192.168.0.1 255.255.255.0 duplex auto speed auto no shutdown ! interface fastethernet 1/2 description To_RouterB ip address 192.168.1.1 255.255.255.0 duplex auto speed auto no shutdown ! interface fastethernet 1/3 description To_RouterC ip address 192.168.2.1 255.255.255.0 duplex auto speed auto no shutdown ! 9 sample_template.jinja2 sample_template_2.py 



 4 0 text = “Today is Sunday” pettern = ”Today is (.+)” .:  & (*1( +: $ '#   ) (): 
 match = re.search(pettern, text ) #  !"% match.group(0) # =>Today is Sunday #  
% match.group(1) # =>Sunday 


 
import re # :-' <(> # show version*'%16 show_version_txt = """ Hostname: vsrx Model: firefly-perimeter JUNOS Software Release 12.1X47-D15.4 """ # .#8& # ():  # . : !'" 7 <(>1<( # + : 5/ .#8&3
 , $= regex = "JUNOS Software Release (.+)" # show_version_txt <(>3
# .#8&<(> 4+*' match = re.search(regex, show_version_txt ) #  <(<(>028) print(match.group(0)) print(”--------------------") #  <(>   9;4+ print(match.group(1)) sample_regex.py $ python3 sample_regex.py JUNOS Software Release 12.1X47-D15.4 -------------------- 12.1X47-D15.4    


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  def hello(num): if num == 1: message = “Hello” elif num == 2: message = “Good bye” else: message = “No message” return message # hello(1) 
#  ”Hello”  assertEqual(hello(1), “Hello”) # hello(2) 
#  “Good bye”  assertEqual(hello(2), “Good bye”) # hello(-1)
#  ”No message”  assertEqual(hello(-1), “No message”) # hello(“abc”) 
#  ”No message”  assertEqual(hello(“abc”), “No message”) HI CA 34 ., .2148 - 8 2 10 81 


  8 42 - . -10 8 ,8 48 1 40 0 def add(x, y): sum = x + y return sum sample_unittest.py S OC H OC import unittest import sample_unittest class TestSample(unittest.TestCase): def test_add(self): actual = sample_unittest.add(1,2) expected = 3 self.assertEqual(actual, expected) if __name__ == "__main__": unittest.main() tests/test_sample_unittest.py ├── sample_unittest.py └── tests └── test_sample_unittest.py IA 


  python3 -m unittest tests.test_sample_unittest . ---------------------------------------------------------------------- Ran 1 test in 0.000s OK 4 5 python3 -m unittest tests.test_sample_unittest F ====================================================================== FAIL: test_add (tests.test_sample_unittest.TestSample) ---------------------------------------------------------------------- Traceback (most recent call last): File ”xxx/tests/test_sample_unittest.py", line 12, in test_add self.assertEqual(expected, actual) AssertionError: 3 != 4 ---------------------------------------------------------------------- Ran 1 test in 0.000s 4 5 () (
) python3 –m unittest+/( %#!, &$
test * "__init__.py')-. 

   
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   • 5S 5 ( ( • ) 5 O 0 ( • : ( Cisco Router Juniper Router Arista Router Cisco 
 Juniper 
 Arista 
 


  Manufacturer OS Library Language OS version Cisco IOS / IOS-XE One Platform Kit (OnePK) C, Java, Python ASR1000: 3.12 -3.17(EoL) YANG Development Kit(YDK) Python, C++ 16.5.1 later IOS-XR One Platform Kit (OnePK) C, Java, Python ASR900: 5.1.2 - 5.3.3(EoL) ASR9000: 5.1.1 - 5.3.3(EoL) YANG Development Kit(YDK) Python, C++ 6.0.0 later NX-OS One Platform Kit (OnePK) C, Java, Python Nexus9000: all version Nexus6000: - 7.2(EoL) NX-API Web GUI, HTTP/HTTPS Nexus9000: all version Nexus7000: 7.2(0)D1(1) later Nesus6000: 7.2(0)N1(1) later Juniper JUNOS PyEZ Python 11.4 later Juniper Extension Toolkit(JET) Python 16.2 later Extreme (ex-Brocade) Network OS PyNOS Python 5.0.1 later Arista EOS pyeapi, rbeapi, goeapi Python, Ruby, Go 4.1.2 later EOS SDK C++, Python all version O , 5 S , 1 

: / • L X 33 47 :7 er l • -21 pI I x t • x pX S s c I i T X nH • , / 6 7 76 ) Cisco Router SSH/Telnet 
 show version (Cisco Command) Juniper Router SSH/Telnet 
 show version (Juniper Command) Hostname: vsrx Model: firefly-perimeter JUNOS Software Release [12.1X47-D15.4] . . . E s C D E s C 5( . ) (D Thu Jan 18 02:03:05.771 UTC Cisco IOS XR Software, Version 6.2.1.23I Copyright (c) 2013-2016 by Cisco Systems, Inc. . . . 


   import Exscript # SSH
(*:pip3 install exscript) import re # "( username = "user1" password = "password1" ip4 = "192.168.33.3" # SSH + session = Exscript.protocols.SSH2() session.connect(ip4) #  account = Exscript.Account(name=username, password=password) session.login(account) #  $!
,' session.execute("show version") result = session.response print(result) print("----------") # "( )& pattern = "JUNOS Software Release \[(.+)\]" match = re.search(pattern, result) version = match.group(1) print(version) # SSH #% session.send("exit") session.close() sample_exscript_show.py $ python3 sample_exscript_show.py show version Hostname: vsrx Model: firefly-perimeter JUNOS Software Release [12.1X47-D15.4] ---------- 12.1X47-D15.4  3 () ) , 

) ( print(”===== Step 1. run show command =====") session.execute("show configuration interfaces ge-0/0/1") print(Fore.YELLOW + session.response) # Fore.YELLOW :   print("===== Step 2. configure =====") session.execute("configure") config_txt = "set interfaces ge-0/0/1 disable" session.execute(config_txt) print(Fore.YELLOW + session.response) #    print("===== Step 3. commit check =====") session.execute("show | compare") print(Fore.YELLOW + session.response) session.execute("commit check") print(Fore.YELLOW + session.response) print("===== Step 4. commit =====") print("Do you commit? y/n") # 
y or n choice = input() if choice == "y": session.execute("commit") print(session.response) else: session.execute("rollback") print(session.response) session.execute("exit") print(session.response) print("===== Step 5. run show command(again) =====") session.execute("show configuration interfaces ge-0/0/1") print(Fore.YELLOW + session.response) $ python3 sample_exscript_set.py ===== Step 1. run show command ===== show configuration interfaces ge-0/0/1 unit 0 { family inet { address 10.0.1.1/24; } } ===== Step 2. configure ===== set interfaces ge-0/0/1 disable ===== Step 3. commit check ===== show | compare [edit interfaces ge-0/0/1] + disable; commit check configuration check succeeds ===== Step 4. commit ===== Do you commit? y/n y commit commit complete exit Exiting configuration mode ===== Step 5. run show command(again) ===== show configuration interfaces ge-0/0/1 disable; unit 0 { family inet { address 10.0.1.1/24; } } sample_exscript_set.py()    : sample_exscript_set.py
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 Cisco Router Juniper Router Cisco 
 Juniper 
 get_network_driver(”iosxr") get_facts()[‘os_version’] 12.1X47-D15.4 get_network_driver("junos") get_facts()[‘os_version’] 



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    ( 5 A ( , - 0 25 . )8 21 , 2 # NAPALM  # : pip3 install napalm) import napalm from pprint import pprint # JUNOS  driver = napalm.get_network_driver("junos") device = driver( hostname="192.168.33.3", username="user1", password="password1" ) #   ! device.open() # x fact = device.get_facts() pprint(fact) # pprint:  
 print("----------") # 
() print(fact["os_version"]) device.close() sample_napalm_show.py $ python3 sample_napalm_show.py {'fqdn': 'vsrx', 'hostname': 'vsrx', 'interface_list': [ 'ge-0/0/0', 'ge-0/0/1', 'ge-0/0/2', . . . , 'vlan'], 'model': 'FIREFLY-PERIMETER', 'os_version': '12.1X47-D15.4', 'serial_number': '83f144ddd4f7', 'uptime': 8309, 'vendor': 'Juniper'} ---------- 12.1X47-D15.4  IC CH 

) ( . . . print("===== Step 1. run show command =====") print("Interface Status: ", end="") if device.get_interfaces()["ge-0/0/1"]["is_up"] == True: status_before = ”UP" elif device.get_interfaces()["ge-0/0/1"]["is_up"] == False: status_before = ”DOWN" print(Fore.YELLOW + status_before) print("===== Step 2. configure =====") device.load_merge_candidate(filename="./sample_config_junos.txt") print("OK") print("===== Step 3. compare configuration =====") print(Fore.YELLOW + device.compare_config()) print("===== Step 4. commit =====") print("Do you commit? y/n") choice = input() if choice == "y": print("Commit config: ", end="") device.commit_config() print("OK") else: print("Discard config: ", end="") device.discard_config() print("OK") print("===== Step 5. run show command(again) =====") print("Interface Status: ", end="") if device.get_interfaces()["ge-0/0/1"]["is_up"] == True: status_after = ”UP" elif device.get_interfaces()["ge-0/0/1"]["is_up"] == False: status_after = ”DOWN" print(Fore.YELLOW + status_after) interfaces { ge-0/0/1 { disable; } } )( sample_napalm_set.py() $ python3 sample_napalm_set.py ===== Step 1. run show command ===== Interface Status: UP ===== Step 2. configure ===== OK ===== Step 3. compare configuration ===== [edit interfaces ge-0/0/1] + disable; ===== Step 4. commit ===== Do you commit? y/n y Commit config: OK ===== Step 5. run show command(again) ===== Interface Status: DOWN 
sample_config_junos.txt 

 
    • s c N N O • k c l S l S a in • s c O W be • l : , S t A O A • ( ) 62 1 ,. , .03 Ansible 
 (playbook) Cisco Router Juniper Router Ansible iosxr Module Ansible junos Module iosxr-facts debug: var=ansible_net_version junos-facts debug: var=ansible_net_version 12.1X47-D15.4 

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() ) ? ., .21 8 - 6 8 2 10 81 HI C A pip3 install ansible pip3 install ncclient #
junos - hosts: vsrx1 connection: local gather_facts: no tasks: - name: Get basic information junos_facts: - name: show model name debug: var=ansible_net_model - name: show serial number debug: var=ansible_net_serialnum - name: show version debug: var=ansible_net_version [vsrx1] 192.168.33.3 [vsrx1:vars] ansible_ssh_user=user1 ansible_ssh_pass=password1    hosts playbook junos_show_1.yaml $ ansible-playbook -i hosts junos_show_1.yaml PLAY [vsrx1] ************************************* TASK [Get basic information] ********************* ok: [192.168.33.3] TASK [show model name] *************************** ok: [192.168.33.3] => { "ansible_net_model": "firefly-perimeter" } TASK [show serial number] ************************ ok: [192.168.33.3] => { "ansible_net_serialnum": "83f144ddd4f7" } TASK [show version] ****************************** ok: [192.168.33.3] => { "ansible_net_version": null } PLAY RECAP *************************************** 192.168.33.3 : ok=4 changed=0 unreachable=0 failed=0  ≈ 

() 3 ., .21 8 - 6 8 2 10 81 [vsrx1] 192.168.33.3 [vsrx1:vars] ansible_ssh_user=user1 ansible_ssh_pass=password1 
 hosts - hosts: vsrx1 connection: local gather_facts: no tasks: - name: send command "show version" junos_command: commands: show version register: result # "result"
 - name: show result debug: var=result.stdout_lines playbook
 junos_show_2.yaml $ ansible-playbook -i hosts junos_show_2.yaml PLAY [vsrx1] *************************************** TASK [send command "show version"] ***************** ok: [192.168.33.3] TASK [show result of "show version"] *************** ok: [192.168.33.3] => { "result.stdout_lines": [ [ "Hostname: vsrx", "Model: firefly-perimeter", "JUNOS Software Release [12.1X47-D15.4]" ] ] } PLAY RECAP ***************************************** 192.168.33.3 : ok=2 changed=0 unreachable=0 failed=0  AC 


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