Learn to Code. Shape Your Future
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This blog is here to teach programming in a practical and effective way that will give you the confidence to make even a bigger difference in your current job, to look for your dream job or to build your own dream project.
I have written this article to help you understand how functions can make your life easier when writing a program in Python. The concept of function in Python is the same as in many other programming languages. Functions allow you to organize code in modular blocks and make code reusable. The more your Python code … Read more
To check if a list contains an item in Python, you can use the “in operator”. This operator returns True if the element exists in the list and False otherwise. An alternative is to use the list count() method. Note: The terms item and element of a list used in this article have the same meaning. … Read more
Imagine you are creating an application in which you have to track multiple users and each user has several properties (e.g. name, surname, and age). You could use a list of dictionaries as a data type to handle this requirement. You can represent the properties related to one user using the following dictionary: To track … Read more
To check if a domain is available you can call the whois command using Python and then parse the output returned by whois. This check can also be done using the nslookup or dig commands. The most common module to execute commands in Python is subprocess. Below you can see the syntax of the whois … Read more
In Python, “flattening” a list means transforming a multidimensional list or a list of lists into a one-dimensional list. It is the technique to simplify the list structure while maintaining the consistency and order of the data structure. The order of the elements in the flattened list of lists remains the same. For example, let’s … Read more
The Bash bad substitution error is a syntax error that can be caused by different reasons. Two common causes for this error are the incorrect use of command substitution and incorrect characters added to the lines of your script, for example extra dollar signs or white spaces. For example, this error occurs when you want … Read more
I have written a Python function that creates a list. How can the function return the list so I can use it in other parts of my program? To return a list from a function in Python, use the return keyword followed by the list you want to return. The approach is the same as … Read more
You can convert a list of strings to a list of integers in Python with a for loop that goes through each item in the list of strings, converts it into an int, and appends it to a new list. A more concise alternative is to use a list comprehension. A third option is using … Read more
Do you want to learn how to convert a string to an int in Python? You are in the right place. This tutorial will clearly show you how to do it. The Python int() built-in function converts a string to an integer. This is required when you want to execute mathematical operations that would fail … Read more
One common error you might see while writing Python code is “list indices must be integers or slices, not tuple”. This tutorial will show you how to fix it. The Python error “list indices must be integers or slices, not tuple” can occur in multiple scenarios. The simplest way to understand what’s causing an error … Read more
