In python please. Write an explanation of the code too, if possible.

Problem Specification In this question you will implement a program to solve a simple task. The task itself is related to a statistical and physical model called a Random Walk. A Random Walk is a string consisting of a random sequence of the letters ' L ' and ' R '. For example: 'L R R L R'. We're going to imagine that this sequence describes a person taking a step left 'L' or right ' R ' at random along a straight line. The question we want to answer is this: In terms pf steps. how far away is the person after taking all the steps? We'll call this the distance, and it will always be positive (or zero). since we don't care which side the person ends up on. Here are some examples to help clarify: - 'L L L': distance is 3 - 'R L L': distance is 1 - 'R R L': distance is 1 - 'R R R': distance is 3 - 'R L L R': distance is 0 - 'L R R L R': distance is 1 You will be given a number of datafiles containing random walks of different lengths. Each file will contain a number of lines. Each line will be a random walk. The program you must write will open the file. read each line. and then display the distance of the random walk for that line. For example, if a datafile contained the examples above. your program would display 3333131