Python Program to Count the Occurrences of Each letter in a Given text file and write output to a file

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#!/usr/bin/env python3 # -*- coding: utf-8 -*- """ Created on Sun Mar 11 16:59:37 2018 @author: beast """ total=0 file_name="random.txt" #text filename of which letter frequency has to be obtained alphabet = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789" # a simple string containing letter which frequency has to be calculated freq_dict = { letter : 0 for letter in alphabet } # dict comprehesnion and initialization all key with 0 s=open(file_name,"r") str=s.read() # get all the content for letter in str: # getting each character if letter in alphabet: #if it belong to alphabet group then only count freq_dict[letter] += 1 total+=1 # increase the count s.close() # close reading of input file output=open("Letter_frquency_outpput_generated.txt","w") #creeate a file to store the result for letter in alphabet: print("{} frequency ={:>5} \t percentage ={:.4f} %".format(letter,freq_dict[letter],(freq_dict[letter]/total)*100)) output.write("{} frequency ={:>5} \t percentage ={:.4f} %".format(letter,freq_dict[letter],(freq_dict[letter]/total)*100)) output.close() #done writing to the file ...bingo