Author

Jasenko Krejić

@krejjas

articles: 11
total claps: 104
top claps: 56
avg read: 3.4 min
paywalled: 7
active: 2024-07-15 → 2026-02-05

Wiki topics

💻 · Programming · 8 📚 · Books & Reading · 4 EDU · Education & Learning · 1 BIZ · Business Strategy · 1

Top tags

#python ·11 #python-programming ·8 #python3 ·6 #python-file-operation ·2 #pcep ·2 #programming ·2 #quiz ·1 #interview-questions ·1 #slice-assignment ·1 #lists ·1

JA Jasenko Krejić

How I passed a PCEP exam

I have been working with Python for few years, although it hasn’t been my primary job-it was more of a help while automating a boring task…

Jul 15, 2024 · 4 min read · 56 claps #python #pcep #pcep3002

TCH

JA Jasenko Krejić

Storing Float Values in Python

For sure, you are used to assign a float value to the variable, like this:

Feb 05, 2026 · 6 min read · 20 claps #python-programming #python #programming

MDA ECO TCH

JA Jasenko Krejić

Python Text File Reading and Writing in various modes, Part 1

Python can be a bit complicated when reading and writing files. Even in text mode, which I am going to discuss in these articles, things…

Dec 11, 2025 · 4 min read · 11 claps paywalled #python #python-programming #python3

Python Text File Reading and Writing in various modes, Part 1

TCH

JA Jasenko Krejić

List Slice Assignment in Python

You know that lists are mutable objects, meaning that elements can be appended, deleted, inserted and few other operations. And you have…

Jan 14, 2026 · 4 min read · 6 claps #python #python-programming #slice-assignment

JA Jasenko Krejić

Passed my PCAP Exam Few Days Ago

Last week, I passed my PCAP Python Institute exam and earned the certification. Before that, I had passed the PCEP exam quite some time…

Jan 23, 2026 · 3 min read · 5 claps paywalled #pcap #pcep #python-institute

JA Jasenko Krejić

Bound-Unbound in Python methods, do you know the difference?

Let me tell you a story about bound and unbound methods in Python classes, which some of you can find very hard to grasp.

Dec 04, 2025 · 2 min read · 3 claps paywalled #python #oop #oop-concepts

Bound-Unbound in Python methods, do you know the difference?

MDA TCH

JA Jasenko Krejić

Python Text File Reading and Writing in various modes, Part 3

In the previous two articles, I have discussed usage of various file open modes in Python: r(the default),r+, w, and w’, as well as using…

Dec 17, 2025 · 3 min read · 2 claps paywalled #python #python-programming #python3

Python Text File Reading and Writing in various modes, Part 3

MDA TCH

JA Jasenko Krejić

Python Text File Reading and Writing in various modes, Part 2

In the previous article, you have seen how to read text files with r file open mode(default mode if it is omitted), and write data using…

Dec 15, 2025 · 3 min read · 1 claps paywalled #python #python-programming #filesystem

Python Text File Reading and Writing in various modes, Part 2

MDA TCH

JA Jasenko Krejić

Python Text File Reading and Writing in Various Modes, the Quiz

This quiz will help you go through the concepts I have discuseed in previous articles. Let”s get started!

Dec 18, 2025 · 4 min read · 0 claps paywalled #quiz #interview-questions #python

Python Text File Reading and Writing in Various Modes, the Quiz

TCH

JA Jasenko Krejić

If a = 3, b = a, what happens to b when a changes?

You’ve probably encountered this before — maybe not in this exact form — but you’ve assigned a value to a variable, and then assigned that…

Sep 16, 2025 · 3 min read · 0 claps paywalled #python #python-programming #python3

If a = 3, b = a, what happens to b when a changes?

HUM TCH

JA Jasenko Krejić

A surprising property of Python list slicing with indices

If you’re working with or learning Python, you probably know that lists are mutable, ordered collections of data that can hold elements of…

Sep 25, 2025 · 2 min read · 0 claps #python #python-list #python3