Python code examples
Learn how to use NumPy for simulations in this tutorial by Alvaro Fuentes, a data scientist with an M.S. in quantitative economics and applied mathematics with more than 10 years of experience in analytical roles. NumPy, also known as Python’s vectorization solution,…
Learn how passwords can be stored without a risk of leaking them in this tutorial by Alessandro Molina, a Python developer since 2001 and currently the core developer of the TurboGears2 web framework and maintainer of Beaker Caching/Session framework.While cryptography is…
Working with VBA is usually not considered high level of programming. Still, when it comes to Excel, this is probably the best solution. However, Python has some libraries which can help a bit, if you are willing to “mimic” the…
Selecting Python for a “weapon” of choice has many positive points, which I am not going to describe now. Still, if you want to run python code with the help of VBA and the Shell through the CommandPrompt of Windows,…
Working with Python and Excel together is really fun for a VBA Developer! It somehow shows you what all these years of coding with VBA have taught you! Today, I was thinking how to implement the .Find() method of searching in…
The XlsxWriter library of Python is a nice gem for a VBA developer – you would be really interested to see the problems a Python developer should be facing, just to achieve a simple part Excel automatization. Still, these are…
In less than 4 days I would be travelling to Berlin to see what is happening on the DevOpsCon there. I will be present for a whole day workshop for machine learning with Python, thus I have decided that it…
Some month ago, I have kindly received two books from Apress.com for a review. The first one was for Python Data Analytics, which I have already reviewed and the second once was Python Algorithms. Before starting the review, let me…
A new book review is coming in the next weeks – I have noticed the Python books of Apress some time ago and today I was provided with a paper copy for a review. The review is yet to come!
Hello party people! 🙂 Today I was wondering whether I have forgotten to code in Python after 4 weeks of coding marathon in VBA and I have decided to try a small portion of the weekly challenge from CodeForces! So, the…
In the current article I will try to solve a problem for calculation of average distance with Dijkstra, given in codeforces.com contest here in pdf. What is the problem like? We have n weighted graphs like this: For each given graph,…
Sometimes complicated algorithms are really easy to be written down. The current problem is solved in 6 lines of code (from line 5 to line 11), but it you need to put effort to understand how the algorithm works and what are…
Yesterday I have spent some hours, trying to resolve one problem for shortest paths. The problem was coming from HackBulgaria and was somehow similar to these two problems here: Get the shortest path in a weighted graph with Dijkstra Dijkstra for…
Today I was looking into the following problem for word counter in python from Hack Bulgaria: You are given a rectangular table filled with characters and a word. Your task is to count the occurrences of the word in the…
In this article I will present the solution of a problem for finding the shortest path on a weighted graph, using the Dijkstra algorithm for all nodes. The problem is formulated by HackBulgaria here. Pretty much, you are given a…
After the article here, concerning the building of the binary trees and their usefulness, today I will show how to use these trees in action 🙂 Imagine that we have the following problem, used in arena.hackbulgaria.com: Implement a program in…
Binary trees are really useful, if you are solving an algorithmic problem. They consists of nodes (a.k.a vertices) and edges. Thus, each node has two edges, which are leading to another node. Something like this: The above tree is a simple random non-balanced…
Yesterday, I have started to solve problems from a challenging Russian site for programming competitions. Today, I have decided to spend about 30 minutes on another problem, which seemed easy, but I am already spending hours on it, without being able…
About 3 weeks ago, I have enlisted myself in some course for algorithms. There, one of the guys mentioned a web site for web contests and I have decided to take a look. The site is called Timus.ru and the…
How did it all start? When I was a student at the University of Sofia, I had to translate about 100 pages of the Greek Military Codex, which was quite an unpleasant task (if someone claims the opposite – run away from…
As I have already mentioned, the following 2 months I will be dealing with algorithms! Thus, I have enlisted myself in a course for them and I will be spamming my site constantly with some useful (mainly for me) stuff…
About 15 weeks ago, I was making my first steps in Python (sometimes it is a pity that I do not have dates on my articles, but I like it this way). During my first steps, once I had the…
This month I have finished with my Python course in HackBulgaria, thus I have decided to continue with a course, called Algorithms. The course had a requirement of three tasks, which should be resolved in a reasonable time. The first one…
Some time ago I started to interest myself in algorithms. Thus, I bought 2 books about them and I started to read 🙂 The first problem in the first book was explaining the Stable Matching Problem. The essence of the problem is that…
So, some time ago I have started to create apps in Django with Python. It is really fun and amazing, what one can achieve with this package 🙂 E.g., I have generated a small app, counting words and analyzing their repeatability,…
Sending e-mail through the internet is quite a trivial trick in many programming languages. Some time ago, I have shown how to send MS Excel range as an e-mail and how to send a mail through VBA, with HTML. As far…
Using SQL in Python reminded me of the “fun” I used to have in VBA MS Access, when I had to concatenate strings in VBA. Probably I was not the only one having “fun” and enjoying it, thus some good and…
Some time ago, I have built something like a primitive SQL language for C# here. Today, I have worked on a similar task, checking the powers of Sqlite3 with Python. This time it was not that primitive and the results were better…
Have you ever wondered on what servers the top 50 most visited Bulgarian sites run? That is definitely an interesting question, if you are Bulgarian IT admin and you have pretty much free time 🙂 Anyway, as far as I am…
Who follows you? Who follows your followers? And who follows the followers of your followers? And what about the next level? These are pretty interesting question actually. With easy answers, if you are interested only in GitHub. The GitHub team have provided…
