This Python course focusses on teaching Python for use in network automation and network DevOps.
We focus on getting delegates up and running with Python and network automation as quickly as possible rather than making them great programmers. In other words we concentrate on enabling delegates to use network automation libraries such as netmiko and NAPALM and APIs such as NETCONF rather than enabling delegates to produce object oriented programs.
Hands on sessions use Cisco and Juniper devices.
TCP/IP foundation for engineers
By the end of the course delegates will be able to:
What is Python?
Programming languages, Why Python? Python in interactive mode, Python scripts, ipython, Python version 2 versus version 3. A simple Python script. Comments.
Hands on Installing Python, Hello world.
A network example
On box vs off box Python. telnet, ssh, NETCONF, HTTP, APIs, manufacturers and API support, analysis of a simple telnetlib program.
Hands on Using Python to retrieve the configuration from a network device. Using wireshark to analyse the actions.
I/O operators, variables and assignment, types, indentation, loops and conditionals.
Hands on Modifying the telnet program, changing configurations on a network devices.
Functions, classes and methods
What are functions, calling functions, builtin functions, useful builtin functions, file handling, classes, objects, creating instances.
Hands on Storing configurations in files, configuring devices from files, using an inventory file to work on multiple devices.
Libraries and modules
Modules, files and packages, import, from-import, Python standard library, other packages, pip install, executing other programs. Managing python libraries.
Hands on Using pip, installing and using ipaddress, subprocess to access netsnmp. For the more advanced, using the sockets library.
Paramiko and netmiko
SSH, enabling SSH on devices, keys. Paramiko versus netmiko, example scripts. pexpect. Hands on Configuring VLANs from Python.
Gathering facts using previous methods, SNMP review, pySNMP GET, pySNMP and SNMPv3. easySNMP library.
Hands on Walking a MIB from Python.
What is NETCONF? Enabling NETCONF on devices, A first ncclient script, device handlers, get_config, edit_config, copy_config, delete_config, commit, validate, pyEZ, utils_config, utils.sw.
Hands on Configuration using ncclient and PyEZ. This session is expanded for those interesting in JunOS automation.
Manipulating configuration files
Builtin functions, string handling. Unicode. Sequences, strings, lists, tuples. Dictionaries. TextFSM. Regular expressions. JSON, YAML, XML, YANG, Jinja2, templates. Hands on Jinja2 templating with Python to configure network devices.
Getters, configuration operations, supported devices, NAPALM transport, Config-replace, Config-merge, Compare config, Atomic changes, rollback. Example NAPLAM scripts. Hands on Using NAPALM to gather facts, Using NAPALM for configuration management
REST and RESTCONF
What is REST, HTTP methods, GET, POST, cURL, Postman, Python requests library. RESTCONF, a RESTCONF example.
Hands on Modifying a configuration using RESTCONF.
What is scapy, Scapy in interactive mode, Scapy as a module.
Hands on Packet crafting from Python.
Errors and exceptions, Exception handling, try, except. Memory management. Garbage collection. Context management, With.
Hands on Improving Python code.
Writing your own functions, Writing your own classes. pyntc.
Hands onWriting reusable code.
Join our public courses in our Istanbul, London and Ankara facilities. Private class trainings will be organized at the location of your preference, according to your schedule.