An example how subcommands can be used with argparse module: Sample output: markku@btest:~/temp$ python3 argtest.py usage: argtest.py [-h] [-c CONFIG_FILE] {update-device,add-vlan} … positional arguments: {update-device,add-vlan} update-device update device data add-vlan add a VLAN optional arguments: -h, –help show this help message and exit -c CONFIG_FILE, –config-file CONFIG_FILE specify the configuration file to read (default: argtest.cfg) […]
Category: Programming
Set Paste Mode in Vim
When pasting indented data to Vim, set it to paste mode: :set paste To go back to normal mode: :set nopaste
Get Linux Distribution Name and Version with Python
Since Debian 10 Buster there is no minor version number in lsb_release output or /etc/os-release anymore. Bug has been filed, but apparently there is no will to get the full version number back. The dist() and linux_distribution() functions in the platform module in Python have been deprecated in 3.5 and removed in 3.8.0: Also, the […]
Even Better Webhook Listener
I made some improvements to the NetBox webhook listener presented in my earlier post. Here is the new one: Example from the log file: Notable changes: Added the message digest verification (X-Hook-Signature header sent by NetBox) Added content length checking as an example of all the worries you need to take care of when publishing […]
Webhook Listener for NetBox
Note: There is an improved version in the next post. Following my earlier post about implementing a REST API, here is a simple listener for NetBox webhooks: webhook-listener.py: With the other configurations described in the earlier post (and after configured NetBox to send the webhook POST requests to http://my.server.local/webhook/), these are the outputs: webhook-listener.log: Automatically […]
My First REST API with Python and Flask-RESTPlus
With few or no explanations, on Debian 10: The actual API app, in ~/resttest/resttest.py: ~/resttest/wsgi.py: /etc/systemd/system/resttest.service: /etc/nginx/sites-available/resttest: Final setup steps: Testing results: Also note that the Swagger UI is automatically accessible in http://my.server.name/: Some future considerations: TLS encryption (= reconfiguring NGINX) Authentication for the API Disabling/customizing the Swagger UI Links: Flask Flask-RESTPlus NGINX The post […]
Version Numbering in Python Package
A revisit for this topic is available in: Revisited: Version Numbering in Python Package After written the short Python package post I realized that the version number (actually string but anyway) of the package is now in two different places: in the package code (__init__.py) and in the package install metadata (setup.py). Obviously that’s not […]
Creating a Python Package, the Cruel Way
This is how you can create a package of Python code so that you can use the module in various projects. Let’s assume this is the code your module has: STUFF_VERSION = “1.1-dev” def get_stuff(): return “This is stuff. Use it wisely.” Of course the module can be much more complicated with various functions and […]
Configuration File Parsing in Python
Example of configuration file parsing in Python: With the configuration file configtest.cfg: Example output: More information: https://docs.python.org/3/library/configparser.html Also available in GitHub: https://github.com/markkuleinio/python-config-parsing
Logging in Python
Example of configuring logging in Python: Output: More information: https://docs.python.org/3/library/logging.html