The famous PEP 572, and one of the reasons Guido Van Rossum - Python BDFL - retired from decision process (stepped down as BDFL). It is called “Assignment Expressions”, and is about adding new syntax := that will allow assign to variables within an expression.
In Python, we have positional and keywords arguments. With the introduction of new syntax in PEP 570, we can specify positional-only parameters in Python function definitions. This feature is especially useful for library developers, to ensure correct usage of an API. Let’s discuss what this PEP is all about.
PEP (Python Enhancement Proposal) are describing new features, processes or other guidelines and information. They are written primarily for core CPython or other implementation developers. But actually, they are fun and interesting read for a regular developer as well. It is because the authors are really polishing the documents (standards are rigorous) and in addition to documentation, we can get to know proposed or already implemented features. Anyway, fun to read. One disadvantage, PEPs are sometimes long.
Coming from for Java world we could ask what the best way for method overloading in Python language is. There are many ways to achieve that; some are even considered an anti-patterns. Let’s through a few of them and choose the best.
Task: Define the function that takes two parameters (dictionaries as default). Without modifying original dictionaries return the new one that includes all key and value pairs however, if key repeats itself, then add values
a = {'a': 5, 'b': 1, 'c': -1, 'd': 1}
b = {'a': 1, 'b': 5, 'c': 1, 'e': 1}
solution = {'a': 6, 'b': 6, 'c': 0, 'd': 1, 'e': 1}
Task: merge and sort two ordered lists
list_a = [8, 10, 12, 44, 63, 66]
list_b = [2, 3, 20, 106, 144]
solution = [2, 3, 8, 10, 12, 20, 44, 63, 66, 106, 144]
In my spare time, I am creating small Django web application, designed for language schools administration. This month I decided to deploy it to the server finally. Quick research gave me a few possibilities: home setup with raspberry pi (kind of free), pythonanywhere.com (free/paid), heroku.com (free/paid), digitalocean.com (paid), linode.com (paid). I have chosen DigitalOcean, and here are is why.
Santa Claus Rally is a seasonal increase of stock value in financial markets that usually occurs in last weeks of December. It is caused by, as always too optimistic, feelings of traders. This year expected rally did not start very positively (special greetings for crypto holders), and I can almost hear cries of many people.. ;)
Well, at least in software development things are not changing in such a drastic way. A good example of this is the Django web framework. Because Django is mature and stable, even having an increased release cycle (currently feature release is every eight months and LTS every two years), things are progressing rather slowly.
This morning for the interviewed person we had a short algorithmic task. Given n = 5, create a list of multiplied integers:
[1, 2, 2, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 5]
My little tour on Python Web Shops is over for now. It has been an excellent chance to see what is going on in the town. I have been applying mainly for a web developer position. Below is a list of few interview questions I have got. I will answer the most interesting or ones that require more in-depth research in the next articles.