Category: Programming

Count Lines of Python Code

I have created a new application called lopc (Lines of Python Code). It is available for install with pip on PyPI (https://pypi.org/project/lopc/), and the source code is available on GitHub: https://github.com/markkuleinio/lopc The app really only counts the number of non-empty and non-comment lines of *.py files in the given directories. These are some features of […]

Python f-String Formatting Codes

Here is my short list about the common f-string formatting codes in Python: >>> score = 123.728 >>> f”{score}” ‘123.728’ Minimum field length: >>> f”{score:>10}” ‘ 123.728’ >>> f”{score:<10}” ‘123.728 ‘ >>> f”{score:^10}” ‘ 123.728 ‘ Number of decimals: >>> f”{score:.2f}” ‘123.73’ >>> f”{score:10.2f}” ‘ 123.73’ >>> f”{score:<10.2f}” ‘123.73 ‘ Padded with a character: >>> […]

Configuring Logging in NetBox

Creating the log file and setting the permissions: $ sudo mkdir /var/log/netbox $ sudo touch /var/log/netbox/netbox.log $ sudo chown -R netbox.netbox /var/log/netbox $ Configuring NetBox (in /opt/netbox/netbox/netbox/configuration.py): You can set the level for the loggers as needed, in this setup the file handler accepts DEBUG and higher but the actual loggers (“django” and “netbox”) only […]

Basic Mocking with Pytest

Since I always seem to search for these examples over and over again, here it is, basic mocking with pytest. My example code is this (testmodule.py): It can be run: $ python3 testmodule.py In testfunc, sleeping $ Not surprisingly, running it takes about five seconds. The time.sleep() call simulates some long-running operation in the code. […]

Saving Gzip Files in Python

I have various Python applications that run periodically and deal with data in lists and dictionaries, and they save the processed and/or discovered data as JSON in text files for logging purposes or other later use. Typically the files are quite large and take up substantial amount of disk space. Since the applications run on […]

Selecting Pynetbox Version

If you have: And you need: Then you need to use: Because: NetBox 3.2.0 or newer /api/ipam/vlan-groups/<id>/available_vlans pynetbox 6.5.0 or newer Feature was added in NetBox 3.2 NetBox 3.1.1 or newer /api/ipam/prefixes/<id>/available_ips (or _prefixes) pynetbox 6.4.1 or newer NetBox behaviour was changed, pynetbox was updated to support that NetBox 3.1.0 or newer /api/wireless pynetbox 6.4.0 […]