Problem Formulation Given a number of functions f1, f2, …, fn. How to chain the function calls so that the output of the i-th function is used as input for the (i+1)-th function? f1() —> output f1() is input of f2() —> output f2() is input of f3() … —> … is input of fn() … Read more
The Python ord() function takes a character (=string of length one) as an input and returns the Unicode number of this character. For example, ord(‘a’) returns the Unicode number 97. The inverse function of ord() is the chr() function, so chr(ord(‘a’)) returns the original character ‘a’. Here are three examples of passed Unicode characters transformed … Read more
Fear Your Coding Interview? This article shows you how to make your coding interview a success. General Tips to Prepare Your Interview Watch the following Instagram post and learn about popular Python interview questions (swipe left, swipe right): Sieh dir diesen Beitrag auf Instagram an [CHALLENGE] How many of the three questions can you answer? … Read more
Hey Finxters! It is time for another Top 10 Cheat Sheets for all of the developers out there to have saved to a folder or taped to the wall. No matter how you collect these cheat sheets, keep them on hand for reference. Today we will be taking a look at the Command Line using … Read more
A set is an unordered collection of elements. Each element can exist at most once in a set. There are no duplicate elements. Goal: How to intersect to Python sets? Solution: set_a & set_b The set intersection operator set_a & set_b intersects two sets, i.e., creates a new set with elements that exist in both … Read more
Like most coders, I regularly consult a search engine—yeah, as if there were many good options ;)—to learn about parameter lists of specific Python functions. If you truly stand on the shoulders of giants, and leverage the powerful Python libraries developed by some of the best coders in the world, studying the API of existing … Read more
Python’s locals() function returns a dictionary of name –> object mappings. The names are the ones defined in the current local scope, i.e., defined within the current module, class, method, or function—whatever the most local scope is. The objects are the values associated to these names. For example, if you set variable x = [1, … Read more
Python’s built-in “dunder” function __import__() allows you to import a library by name. For example, you may want to import a library that was provided as a user input, so you may only have the string name of the library. For example, to import the NumPy library dynamically, you could run __import__(‘numpy’). In this tutorial, … Read more
Challenge: This article shows how to sort a Python list using the key argument that takes a function object as an argument. Quick Solution: You can use the lambda function to create the function on the fly as shown in the following example: Explanation: The code uses the key argument and passes a lambda function … Read more
A piece of Python code is a waste of time and resource without communicating with the real world. In this tutorial, you’ll master the humble, but powerful, Python print() function. Python’s built-in print() function prints a string representation of any number of objects to the standard output. The print() function has many advanced arguments to … Read more
Python’s globals() function returns a dictionary of name –> object mappings. The names are the ones defined globally, i.e., defined by Python or in the outside scope of your program. The objects are the values associated to these names. For example, if you set variable x = [1, 2, 3], the globals() dictionary will contain … Read more
Challenge: Run a piece of Python code forever—until it is forcefully interrupted by the user. Solution: use a while loop with a Boolean expression that always evaluates to True. Examples: have a look at the following variants of an infinite while loop. You can also use a while condition that always evaluates to True. For … Read more