ChrisHow to write a NumPy array to a CSV file in Python? To write a NumPy array to a CSV file, use the np.savetxt() function and pass the filename as a string, as well as the array into it. Optionally, you can specific the file format, the delimiter such as comma or semicolon, and other … Read more
💬 Question: How to convert a list of custom objects to a csv file? Example: Given is a list of custom objects of, say, type Employee that holds the name, job description, and income like so: Your goal is to write the content of the list of objects into a comma-separated-values (CSV) file format. Your … Read more
This tutorial gives you a simple introduction to Python’s NumPy library. You don’t need any prerequisites to follow the tutorial. My goal was to give a practical and fun NumPy introduction for absolute beginners with many examples. 💡 By reading through this tutorial, you will gain a basic understanding of the most important NumPy functionality. … Read more
Are you interested in Python but you don’t know which Python library is most attractive from a career point of view? Well, you should focus on the library you’re most excited about. But if you’re generally open because you have multiple passions, it would be reasonable to also consider annual and hourly income. These are … Read more
Problem Formulation Given a Python string: 💬 Question: How to convert the string to a CSV file in Python? The desired output is the CSV file: ‘my_file.csv’: a,b,c 1,2,3 9,8,7 Simple Vanilla Python Solution To convert a multi-line string with comma-separated values to a CSV file in Python, simply write the string in a file … Read more
If you’re short on time, the simple solution is to run the following command in your shell/terminal/CMD/PowerShell to check the version of library xxx: But many more interesting ways to check package versions may be useful for you! The following table refers to a list of articles to help you check the package/library/module version installed … Read more
In this article, I’ll show you how to check the version of a Python module (package, library). These are the eight best ways to check the version of a Python module: Let’s dive into some examples for each of those next! Method 1: pip show To check which version of a given Python library, say … Read more
🔒 Do you want to go deep into databases? The following career paths for coders interested in the broad database space are ordered alphabetically. The table shows the annual income of different job descriptions in the database space: Job/Career Description Annual Income $USD (Lower) Annual Income $USD (Higher) Cassandra Developer 110,000 145,000 Couchbase Developer 87,000 … Read more
Problem Formulation 💬 Question: Given a Python list stored in a variable lst. How to remove the first and last elements from the list lst? Example: The list [‘Alice’, ‘Bob’, ‘Carl’, ‘Dave’] stored in variable lst becomes [‘Bob’, ‘Carl’]. Method 1: Slicing List[1:-1] To remove the first and last elements from a Python list, use … Read more
This article will go over the top 21 most attractive developer jobs in the decade to come. Note that the purpose of this article is to look forward to the future rather than looking backward into the past. The future is inherently uncertain but we did everything we could (as you’ll see) to remain objective … Read more
The TypeError: unhashable type: ‘list’ usually occurs when you try to use a list object as a set element or dictionary key and Python internally passes the unhashable list into the hash() function. But as lists are mutable objects, they do not have a fixed hash value. The easiest way to fix this error is … Read more
Problem Formulation 💬 Question: Given a list of lists (=nested list) in Python. How to convert this list of lists to a set in Python? This is not a trivial problem because Python lists are mutable and, therefore, not hashable. And because of that, they cannot be converted to a set using the direct set() … Read more