Question

1. Write a python program that reads a file and prints the letters in increasing order of frequency. Your program should convert entire input to lower case and only counts letters a-z. Special characters or spaces should not be counted. Each letter and it's occurrences should be listed on a separate line.

2. Test and verify your program and it's output.

---Please provide a code and a screenshot of the code and output. Thank you. ----

Answer 1

def CountLetterInFile(filename):
   dictionary = {}
   with open(filename,'r') as f:
       # read file and convert to lowercase
       read = str(f.read()).lower()
       # extraxt string without special character
       string = ''.join(c for c in read if c.isalnum())
   # print(string)
   # count ocuurence
   for key in string:
       if key in dictionary.keys():
           dictionary[key] += 1
       else:
           dictionary[key] = 1
   # print result
   for key, value in dictionary.items():
       print(key,": ",value)
      
CountLetterInFile("CountLetterInFile.txt")