The most Pythonic way to convert a list of integers ints to a list of floats is to use the list comprehension expression floats = [float(x) for x in ints]. It iterates over all elements in the list ints using list comprehension and converts each list element x to a float value using the float(x) … Read more
Summary: To convert a string object to float object use the float(string_input) method which typecasts the string input to a floating-point value. Introduction Before learning how to convert a string object to a float object, let us understand what is type conversion in Python. ✎ The process of converting an object of a particular data … Read more
Problem Formulation Given a string in hexadecimal form: How to convert the hex string to an integer in Python? For example, you want to convert the hexadecimal string ‘0xff’ to the decimal integer 255. Here are a few other examples: 0x0 –> 0 0x4 –> 4 0x8 –> 8 0x12 –> 18 0x16 –> 22 … Read more
Being hated by newbies, experienced Python coders can’t live without this awesome Python feature. In this article, I give you everything you need to know about set comprehensions using the bracket notation {}. What is Set Comprehension? Set comprehension is a concise way of creating sets in Python using the curly braces notation {expression for … Read more
This article will walk you through the different numerical systems that can be used to represent numbers in Python. The system that we usually use in our daily life is the decimal system and, as the name suggests, it is based on 10 basic digits from which we can obtain all the numbers. Out of … Read more
Method 1: Iterating over Consecutive (Sliding) Windows Given are: Python list lst Window size n Problem Formulation: How to loop through the list in consecutive element-windows of size n, so that in each iteration, you can access the n next elements in the list? # INPUT: lst = [‘a’, ‘b’, ‘c’, ‘d’, ‘e’, ‘f’, ‘g’] … Read more
Tuples, Strings, and Lists Before we look at creating tuples, as a starting point it would be useful to clarify the meaning of the various terms we will be using throughout this article: A string is a sequence of characters, and represents one of the main Python data types. A list is used to store … Read more
✯ Overview Problem: Fixing TypeError: list indices must be integers or slices, not str in Python. Example: The following code lists a certain number of transactions entered by the user. Output: Solution: Please go through this solution only after you have gone through the scenarios mentioned below. Bugs like these can be really frustrating! ? But, … Read more
[Reading time: 9 minutes] Graphs are everywhere. They are used in social networks, the world wide web, biological networks, semantic web, product recommendation engines, mapping services, blockchains, and Bitcoin flow analyses. Furthermore, they’re used to define the flow of computation of software programs, to represent communication networks in distributed systems, and to represent data relationships … Read more
Problem Formulation Given an integer number n. Given an initial string value s. How to create an array of n copies of s in Python? # Input: n = 5 s = ” # Output: [”, ”, ”, ”, ”] Method 1: List Multiplication Python doesn’t have a built-in array type. The equivalent of an … Read more
Python’s built-in iter() function returns an iterator for the given object. For example, iter([1, 2, 3]) creates an iterator for the list [1, 2, 3]. You can then iterate over all elements in the iterator, one element at a time, in a for or while loop such as: for x in iter([1, 2, 3]). Basic … Read more
Python’s built-in slice() function returns a new slice object you can use to slice over sequences such as lists, strings, or tuples. Read more about lists in our full tutorial about Python Slicing. Example 1: Slice with Stop Argument One of the best way to learn is by example! Here are some examples of how … Read more