If you are using Pydantic in Python, which is an excellent data parsing and validation library, you’ll often want to do one of the following three things with extra fields or attributes that are passed in the input data to build the models: Ignore the extra fields or attributes, i.e., they should not be present […]
If you write a script or a program and put it in a folder that is present in your PATH environment variable, then you will be able to invoke it directly with the name. So for instance let’s say you have a silly script like this in /home/user/listfiles: and if you put the target directory […]
In the previous post, I talked about using cProfile (via Werkzeug Application Profiler Middleware) to profile parts of code or routes in Flask web apps. In this one, we’ll explore another tool called pyinstrument that does statistical profiling instead of deterministic profiling, that can be easily used with Flask or any other web framework like […]
There will be times when one of your Flask application routes will slow down and you will want to find out exactly which parts in the request flow consume the most amount of time. One could use time.time() to measure the elapsed time between two points in the codebase but that still doesn’t tell us […]
Trying to print(var) in your pytest tests and wondering why you cannot see the output in your terminal’s standard output? This is because by default pytest captures all output sent to stdout and stderr, i.e., it intercepts the data going into the low-level file descriptors 1 and 2. This is a good idea because pytest […]
Once you spend some time working with Firebase you definitely want to know how they do authentication, especially in terms of the auth tokens or session IDs. I have previously written about where or how the relevant auth tokens are stored for Web JavaScript SDK, but this article by Jacob Wenger does an excellent job […]
I’ve been curious about where Firebase’s JavaScript SDK for web apps stores the auth tokens or session IDs to authenticate users and keep them “logged in”. Initially, I thought maybe the authentication happens via cookies but when I tried deleting all the cookies, I was still logged in as a user in my web app […]
In the previous article, we learnt everything about how to export data from Cloud Firestore into Cloud Storage and import data from Cloud Storage into Cloud Firestore (vice-versa). A very common requirement is to have backup and restore operations scheduled to run at regular intervals. For instance backup the entire database daily without any manual […]
Firebase comes with a managed data export and import service for Cloud Firestore that allows us to backup the Firestore database into Cloud Storage and restore from a previously exported backup. This is an extremely important operation for various reasons like: You should always backup your data at regular intervals, as a good practise. Backups […]
There are a bunch of ways to toggle a boolean option in Vim. An example of a boolean option is number that shows line numbers when set or expandtab that inserts spaces instead of the tab character (\t). Setting them is simple: How can we unset or toggle them quickly? Well if you just want […]