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Python Articles
Page 314 of 855
Program to swap string characters pairwise in Python
Swapping string characters pairwise means exchanging adjacent characters at positions (0, 1), (2, 3), (4, 5), and so on. This is useful for simple text transformations and encoding operations. Problem Statement Given a string, swap all odd positioned elements with even positioned elements to create a pairwise swapped permutation. For example, if the input is s = "programming", the output will be "rpgoarmmnig". Algorithm To solve this problem, we follow these steps − Convert the string to a list of characters Iterate through the string ...
Read MorePython program to define class for complex number objects
Complex numbers are mathematical objects with real and imaginary parts, typically written as a + bi. Python allows us to create a custom Complex class to handle complex number operations like addition, subtraction, multiplication, division, and calculating modulus. Operations Overview Our Complex class will support the following operations ? Addition: (a + bi) + (c + di) = (a + c) + (b + d)i Subtraction: (a + bi) - (c + di) = (a - c) + (b - d)i Multiplication: (a + bi) × (c ...
Read MorePython program to print number triangle
Suppose we have a number n. We have to print a triangle with n rows where each line i contains the digit i repeated i times. So, if the input is like n = 5, then the output will be ? 1 22 333 4444 55555 Approach To solve this, we will follow these steps ? For i in range 1 to n+1, do Display (integer part of (10^i)/9*i) Go to next line Mathematical Formula The formula (10**i)//9*i works because: ...
Read MorePython program to find probability of getting letter 'a' in some letters and k sized combinations
Suppose we have an array with n different English letters and a value k. We can select k different indices with uniform distribution and need to find the probability that at least one of the k indices selected will contain the letter 'a'. For example, if we have letters = ['a', 'c', 'a', 'b', 'l', 'a', 'b', 'z'] and k = 2, we need to find all possible combinations of 2 letters and count how many contain at least one 'a'. Algorithm To solve this problem, we follow these steps − Initialize ...
Read MorePython program to check whether we can pile up cubes or not
Suppose we have an array nums containing sizes of n different cubes placed horizontally. We need to make a vertical pile of cubes following this rule: If the ith cube is on top of the jth cube, then the side length of the jth cube must be greater than or equal to the side length of the ith cube. When making the vertical pile, we can only take cubes from the left side or right side, but not from the middle. We need to check whether we can pile them up successfully or not. Problem ...
Read MoreProgram to compute gcd of two numbers recursively in Python
Finding the Greatest Common Divisor (GCD) of two numbers is a fundamental mathematical operation. The Euclidean algorithm provides an efficient recursive approach by repeatedly applying the principle that GCD(a, b) = GCD(b, a mod b). So, if the input is like a = 25, b = 45, then the output will be 5. Algorithm Steps To solve this recursively, we will follow these steps − Define a function gcd(). This will take a, b if a is same as b, then ...
Read MorePython program to find top three mostly occurred letters from company name
Sometimes we need to find the most frequently occurring characters in a company name. This program identifies the top three most common letters and displays them with their frequencies following specific sorting rules. Problem Requirements Given a company name as a string, we need to find the three most common characters by following these rules ? Pick the most frequent three letters Sort them in descending order by frequency If frequencies are equal, sort alphabetically For example, if the input is s = "TUTORIALSPOINT", the output should be [[3, 'T'], [2, 'I'], [2, 'O']]. ...
Read MoreProgram to find area of a polygon in Python
Suppose we have a list of ordered points that represents a simple polygon on a 2D plane. We need to find the area of this polygon using the Shoelace formula (also known as the surveyor's formula). So, if the input is like points = [(0, 0), (0, 5), (3, 5), (3, 0)], then the output will be 15. ...
Read MorePython program to count pairs for consecutive elements
When working with numeric strings, you often need to count how many times each digit appears consecutively. Python's itertools.groupby() function is perfect for this task as it groups consecutive identical elements together. For example, if the input is s = "11522226551", the output should be [(1, 2), (5, 1), (2, 4), (6, 1), (5, 2), (1, 1)] because digit 1 appears twice consecutively at the beginning, then single 5, then four 2s, and so on. Algorithm To solve this problem, we will follow these steps ? Use groupby() function to group consecutive identical digits Create ...
Read MorePython program to count distinct words and count frequency of them
When working with text data, we often need to count how many distinct words appear and track their frequencies. Python provides several approaches to solve this problem efficiently. In this example, we have a list of words where some words may appear multiple times. We need to return the count of distinct words and their frequencies in order of first appearance. Problem Example Given the input: words = ["Book", "Sound", "Language", "Computer", "Book", "Language"] The expected output is (4, '2 1 2 1') because: There are 4 distinct words ...
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