Python for Network Engineers
This repo contains Scripts which are explained in the YouTube Channel NetworkEvolution
List of Directories in this Repository:
Summary of each Directory
This directory contains all the Scripts explained in the below YouTube playlist which has more than 70 Videos.
Training starts from a very beginner level like:
How to initiate SSH Connection to the Device using Paramiko
To Intermediate level of Using NETCONF/YANG, RESTCONF etc
List of all the Scripts
Click here for Complete Videos Playlist In YouTube :Python Learning for Network Engineers
For the Complete Scripts and Video maps please access the folder "`00_Python_Scripts_from_Youtube_Playlist`" in this Repository
These Python scripts Contains Tutorials on:
- Paramiko
- Netmiko
- Nornir
- NAPALM
- Ansible
- NETCONF/YANG
- RESTCONF
- Regex For Parsing
- CSV for Bulk Configuration
- How to use text file for Configuration
This directory contains Scripts which explains how to use Paramiko Library for communicating with Cisco Devices.
- Demonstrates the use of SSH Hostkey policy. Different ways to use hostkey policies :
session.set_missing_host_key_policy(paramiko.AutoAddPolicy())
session.load_host_keys('/home/evolve/.ssh/known_hosts')
session.set_missing_host_key_policy(paramiko.WarningPolicy())
- SSH Keybased Authentication Using Paramiko:
- Paramiko SSH exec_command Example
- Paramiko invoke_shell example
- SSH Password Based Authentication
List of Scripts in the Directory
01_ssh_host_key_policy.py
02.1_ssh_key_cisco_exec_command.py
02.2_ssh_key_cisco_invoke_shell.py
02.3_ssh_key_cisco_invoke_shell_fn.py
Click here for Complete Paramiko Scripts Tutorial Playlist In YouTube :01_Paramiko_Sample_Scripts
For the Complete Scripts and Video maps please access the folder "`01_Paramiko_Sample_Scripts`" in this Repository
This directory contains Scripts which explains how to read Device IP Address and configuration lines from CSV file and configure respective devices using Python.
- Sample CSV FIle Used for Configuring the Device :
- The above CSV file will create a Dictionary in below format
conf_dict={'192.168.0.50': ['terminal len 0',
'config t',
'int gi1',
'no shut',
'exit',
'exit',
'show ip int brie',
'show run int gi1'],
'192.168.0.51': ['terminal len 0',
'config t',
'int lo0',
'ip add 10.0.0.1 255.255.255.0',
'int lo1',
'ip add 11.0.0.1 255.255.255.0',
'do show run int loopback0',
'do show run int loopback1'],
'192.168.0.53': ['terminal len 0', 'config t', 'int gi3', 'no shut'],
'csr1.test.lab': ['terminal len 0',
'config t',
'int gi2',
'no shut',
'ip address 2.2.2.2 255.255.255.0',
'exit',
'exit',
'show ip int brie',
'show run int gi2']}
List of Scripts in the Directory
Click here for Complete CSV Videos Playlist In YouTube :02_Configure_Device_Using_CSV
For the Complete Scripts and Video maps please access the folder "`02_Configure_Device_Using_CSV`" in this Repository
This directory contains Scripts which explains how to parse configuration lines from Cisco Devices Using Regex in Python
Sample Parsed Output :
*Show Version Parser
*Show Running Config Parser Output:
- Regex Patterns Used for Show Version Parser:
version_pattern = re.compile(r'Cisco .+ Software, Version (\S+)')
model_pattern = re.compile(r'cisco (\S+).+bytes of memory\.')
serial_no_pattern = re.compile(r'Processor board ID (\S+)')
uptime_pattern = re.compile(r'(.+) uptime is (.*)')
- Regex Patterns Used for Show running Parser:
hostname_pattern = re.compile(r'hostname (\S+)')
domainname_pattern = re.compile(r'ip domain name (.+)')
pid_pattern = re.compile(r'license udi pid (\w+) sn (\S+)')
netconf_pattern = re.compile(r"netconf-yang\r\n")
username_pattern = re.compile(r'username (\S+) privilege (\d{2})')
interface_pattern = re.compile(r'interface (\S+[.]?\d*)\r\n.+?\r?\n?\s?ip address ([\d\.]+) ([\d\.]+)')
interface_prop_pattern = re.compile(r'interface (?P<name>\S+[.]?\d*)\r\n\s?.+?\r?\n?\s?ip address (?P<ip_aadress>[\d\.]+) (?P<mask>[\d\.]+)')
default_route_pattern = re.compile(r'ip route 0.0.0.0 0.0.0.0.+?([\d.]+)\r\n')
static_route_pattern = re.compile(r'ip route (?P<dst_subnet>[^0][\d\.]+) (?P<mask>[^0][\d\.]+) (?P<next_hop>[\d\.]+)')
List of Scripts in the Directory
Click here for Complete Cisco Configuration Parsing Videos Playlist In YouTube
For the Complete Scripts and Video maps please access the folder "03_Cisco_Config_Parser_Regex" in this Repository
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