Statsmodels is a nice statistics library in Python, which eases the data processing and analysis with Python. The library is available here – statsmodels.org and on its official web site the installation guide is always up to date. In the…
Month: November 2019
Excel – How to build magic square with VBA, following Python Mod Mathematics
Some 4 years ago I wrote an article for calculating magic square with python. What the article did was actually checking whether the square is magic, and not calculating a new one. This one is going to show how these…
Python – Plotting DataFrame and Working with Pandas – Video
Working with Pandas is like working with Excel on steroids – it can really do a lot of things fast, but somehow doing the easy things get complicated. In this video and article tutorial I am presenting loading data to…
Cryptography in Python
After writing about hashing passwords in Python, I have decided to publish the other parts of the chapter, “Cryptography” from the “Modern Python Standard Library Cookbook“, written by Alessandro Molina and and kindly provided to me by PacktPublishing.In the article,…
Tagged with: asking for password, compute_signature, cryptography, getpass, hashlib, history, hmac, ps, Python, verify a message integrity, verifying files integrity
Python – Platforms Jumping – CodeForces
Greedy algorithm is described as an algorithm that follows the problem-solving heuristic of making the locally optimal choice at each stage with the intent of finding a global optimum. Thus, it is always interesting to find a problem, which can…
Python Slice Notation
Python Slice Notation is somehow easy and tough in the same way. Lately, I was doing some competitive programming with Python and I have decided to write a summary of the slice notation, thus there is always a place for…
Python – Binary String Minimizing Problem – CodeForces
Codeforces has introduced a third division in their competitions. Initially I though this is the place to go for “easy” stuff, as far as some of the 2nd division problems require some advanced algorithms, like combinations of graphs and months…
Find all list (li) elements in a special position of a web site
So, my idea was to obtain all the elements, tagged with “li” from here – vitoshacademy.com/all, using BeautifulSoup4 and Python. Initially, I thought about running a simple soup.findAll("li") , but it also added the text from the menus, which were…
Scraping a web site up to the N-th level with Python
Scraping data from a web site has always been a pleasure with Python. If you come from the VBA world, the BeautifulSoup4 is indeed beautiful! I have been scraping a web site with python before, but now as I have…
Dynamic dropdown list in Excel VBA with variables
Dropdown lists in Excel usually are built from a range or from a variable list. Dropdown list from Excel Range Thus, building a dynamic dropdown list may include building a dynamic range, with undeclared end. Thus, let’s imagine that the…
Prime numbers matrix and coloring with Python and xlsxwriter
About 4 years ago, I wrote an article about prime numbers in Excel and their visualisation with VBA – vba-function-in-excel-to-check-prime-numbers. Pretty much, it displays the prime numbers in a 10 x N matrix, starting from 1 and finishing at N:…
Tagged with: align, bg_color, center, Excel, first column and first row of Excel is with index 0, font_color, format, matrix, prime numbers, Python, xlsxwriter
Scraping web site and writing its links to a database with Python
Scraping a web site with BeautifulSoup 4 and Python is a walk in the park, if you have scraped a web site with VBA before. Still, there are a few tricks, that should be taken into account. Trick #1 –…
Adding data to SqlLite3 database with Python
After reading the database to python from the previous post here, it is time to do the ADD data to the database. Our database is created like this:
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CREATE TABLE "drummers" ( "Id" INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, "Name" TEXT, "Band" TEXT ) |
The database has autoincremented primary key, thus we do not need…
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