ChrisBasic Challenge 💬 Challenge: How to convert a CSV file to a text file in Python? Here’s the content of an example CSV file “my_file.csv” used in our code snippet below: If you visualize this CSV in table form, it looks like this: Name Job Age Income Alice Programmer 23 110000 Bob Executive 34 90000 … Read more
Problem Formulation What is the most Pythonic way to convert a CSV file to a list of dictionaries, a list of tuples, and a list of lists? Let’s go over those challenges one by one. 💫 Note: I only show you the most Pythonic solution to each problem — based on my personal opinion — … Read more
Do you have written a decentralized app (dApp) and you want to check it for potential exploits and hacks? Do you need to prepare your dApp for a security audit and vulnerability analysis? Don’t worry, we have your back! 🛡️ In this article based on the smart contract security course by Finxter Creator Yogesh, we’ll … Read more
Problem Formulation Given a CSV file (e.g., stored in the file with name ‘my_file.csv’). INPUT: file ‘my_file.csv’ 9,8,7 6,5,4 3,2,1 Challenge: How to convert the CSV file to a list of tuples, i.e., putting the row values into the inner tuples? OUTPUT: Python list of tuples [(9, 8, 7), (6, 5, 4), (3, 2, 1)] … Read more
Problem Formulation Given a CSV file (e.g., stored in the file with name ‘my_file.csv’). INPUT: file ‘my_file.csv’ 9,8,7 6,5,4 3,2,1 Challenge: How to convert it to a list of lists (=nested list), i.e., putting the row values into the inner lists? OUTPUT: Python list of lists [[9, 8, 7], [6, 5, 4], [3, 2, 1]] … Read more
Convert a CSV file to a list of Python dictionaries in three steps: Create a CSV file object f using open(“my_file.csv”) and pass it in the csv.DictReader(f) method. The return value is an iterable of dictionaries, one per row in the CSV file. Each dictionary maps the column header from the first row to the … Read more
The demand for programming talent has steadily increased in the preceding decades. In fact, there never has been a better time to start learning to code. Why? Because you (yes, YOU! 🧬) can sell your skills for top dollars: The average freelancer earns much more than $100,000 per year. Nobody denies two transformative trends: Programming … Read more
🚀 The mission of Finxter is to help increase collective intelligence. What does it mean to increase collective intelligence? In my view, humanity it’s like a big organism. You and I are two cells of this big organism. There are communication channels between those cells — for example, video, audio, speech, etc. There are many … Read more
import pandas as pd df = pd.read_csv(‘my_file.csv’) df.to_parquet(‘my_file.parquet’) Problem Formulation Given a CSV file ‘my_file.csv’. How to convert the file to a Parquet file named ‘my_file.parquet’? 💡 Info: Apache Parquet is an open-source, column-oriented data file format designed for efficient data storage and retrieval using data compression and encoding schemes to handle complex data in … Read more
Hackers have a wide variety of specific skills that are super valuable in a “white hat” environment. If you’re interested in leaving the “dark side” or you simply want to reduce your risk profile as a hacker—these could be some interesting career paths you could pursue easily without needing to learn a whole new stack … Read more
I’m sitting in front of my computer refactoring Python code and have just thought of the following question: Can You Use a Regular Expression with the Python string.startswith() Method? The short answer is no. The string.startswith() method doesn’t allow regular expression inputs. And you don’t need it because regular expressions can already check if a … Read more
The best way to convert a CSV file to a Python dictionary is to create a CSV file object f using open(“my_file.csv”) and pass it in the csv.DictReader(f) method. The return value is an iterable of dictionaries, one per row in the CSV file, that maps the column header from the first row to the … Read more