Solutions

File operations are frequently used in the programs. If we try to open a file whose path doesn’t exist, an error is thrown and the program halts. To avoid this, we can first check if the file exists in the given path and then open the file. In today’s article, let’s discuss different ways to check if a file exists in Python without using the try-except/finally blocks.  We will be using methods from the pathlib module and os modules. Method 1: Using pathlib.Path object Python has an in-built module named pathlib that can be used to check for any file … Read more

In Python, one can use the input() method to receive the user input. For example, if you want the user to enter two values x, y, and then find the sum of those values, you can do it as follows : x=input(“Enter the value of x: “) y=input(“Enter the value of y: “) print(“x+y is: “,x+y) Output : Enter the value of x: 5 Enter the value of y: 6 x+y is 56 The sum of two numbers 5 and 6 should be 11. However, the output is 56. If you’re wondering why? Then it is because the input() function … Read more

Let’s say you have two numpy arrays as shown below: a=np.array([1,2,3,4,5]) b=np.array([6,7,8,9,10]) Problem : You want a create a pandas series from multiple numpy arrays as shown below. 0 0 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9 10   Solution: Join the contents of the array and then add it as a Series 1. First, let’s join the arrays using any of these methods- np.concatenate(), np.join() ,np.hstack, np.append()   2. Once that is done, simply convert this array to pandas Series. import numpy as np import pandas as pd … Read more

The checkerboard pattern represents a set of 64 black and white squares. Similar to the pattern in the chessboard. In real-time, checkerboard patterns are extensively used to create a no pixel blank area(blank grid). Checkerboard pattern can be represented easily using an array of size 8*8. We can use the numpy module to create an array and fill it with a checkerboard pattern using various functions from numpy. In this article, let’s learn how to create an n*n matrix in a checkerboard pattern. NOTE: If you don’t have numpy, you can install it using the below command: pip install numpy … Read more