There are four main ways to reverse a string in Python: Slicing s[::-1] with negative step size traverses the string from right to left. ”.join(reversed(s)) first creates an iterable of characters in reversed order, and then joins these characters to obtain the reversed string. A for loop using the range(len(s)-1, -1, -1) function traverses the … Read more
Problem Formulation Given two strings x and y. Create a new string xy and print it to the shell. Consider the following examples: INPUT x = ‘hi’ y = ‘finxter’ OUTPUT: hifinxter INPUT x = ‘2’ y = ‘4’ OUTPUT: 24 INPUT x = ‘abc’ y = ‘[1, 2, 3]’ OUTPUT: abc[1, 2, 3] Solution … Read more
Problem Formulation Given two strings x and y. Create a new string xy and print it to the shell. Consider the following examples: INPUT x = ‘hi’ y = ‘finxter’ OUTPUT: hifinxter INPUT x = ‘2’ y = ‘4’ OUTPUT: 24 INPUT x = ‘abc’ y = ‘[1, 2, 3]’ OUTPUT: abc[1, 2, 3] Solution … Read more
Problem Formulation Python has two ways to comment out a block of code: The hashtag symbol # tells the Python interpreter to ignore the rest of the line. To manually commenting out a block of code by inserting a hashtag symbol in front of every line is cumbersome. The multi-line string triple quotes ”’…”’ or … Read more
Learn how to reverse vowels in a string in Python in this article!
Bitwise operators perform operations on the binary (bit) representation of integers. Background: Each integer is first written as a binary number that is a sequence of digits 0 or 1. For example: 0 is written as “0” 1 is written as “1” 2 is written as “10” 3 is written as “11” 4 is written … Read more
Broadcasting describes how NumPy automatically brings two arrays with different shapes to a compatible shape during arithmetic operations. Generally, the smaller array is “repeated” multiple times until both arrays have the same shape. Broadcasting is memory-efficient as it doesn’t actually copy the smaller array multiple times. Here’s a minimal example: Let’s have a more gentle … Read more
Logical operators work on Boolean values but can be used on integers and other objects as well. Python has three logical operators: and, or, and not. The following table provides a quick overview of Python logical operators: Operator Description Example and Returns True if both operands are True, and False otherwise. (True and True) == … Read more
Learn the techniques to solve the plus-one problem and crack your next coding interview!
Today’s tutorial will introduce two slightly more advanced concepts of closures and decorators in Python. We’ll explain what they are, how each is defined, and where and how they will help in your coding. Nested Functions I’m sure you are all familiar with functions, and some of you may have used, or heard of, nested … Read more
Arithmetic operators are syntactical shortcuts to perform basic mathematical operations on numbers. Operator Name Description Example + Addition Calculating the sum of the two operands 3 + 4 == 7 – Subtraction Subtracting the second operand from the first operand 4 – 3 == 1 * Multiplication Multiplying the first with the second operand 3 … Read more
Comparison operators are applied to comparable objects and they return a Boolean value (True or False). Operator Name Description Example > Greater Than Returns True if the left operand is greater than the right operand 3 > 2 == True < Less Than Returns True if the left operand is smaller than the right operand … Read more