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 […]
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: >>> […]
Zabbix API is the way to go when you need to manage Zabbix configurations or get data from Zabbix programmatically. For Python applications one of the community-based libraries is PyZabbix. Note: There is also a package called py-zabbix. That is a different one, not handled in this post. In this post I’ll show: How to […]
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 […]
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. […]
In my previous post we handled timeouts with requests. This post deals with making it easier to react to the errors using the built-in retry features. In this context let’s limit the retry-requiring cases in two categories: Cases that timed out (no response from the server) Cases that returned a transient error from the server […]
The most usual way of making HTTP/HTTPS requests in Python applications is using the requests library. By default it doesn’t define any timeouts for the operations. It means that in specific circumstances a simple requests.get() call might not return at all. Depending on the nature of the application this is not desirable. This post demonstrates […]
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 […]
If you have: And you need: Then you need to use: Because: NetBox 3.3.0 or newer Cable terminations pynetbox 7.0.0 or newer Cable terminations were changed in NetBox 3.3 NetBox older than 3.3.0 Cable terminations pynetbox 6.6.2 (or older) pynetbox 7.0.0 (or newer) only supports NetBox 3.3 or newer NetBox 3.2.0 or newer /api/ipam/vlan-groups/<id>/available_vlans pynetbox […]
In an earlier post I wrote about reading CSV files with Python. This time let’s read some XML using just Python standard library, the ElementTree XML API. For the demonstration I’ll use this short XML output from Nmap: Originally the Nmap output was not indented at all but I copied it to VSCode and reformatted […]