Counting Characters in a File

from string import ascii_letters, ascii_lowercase, ascii_uppercase

def count_characters(stream):
    no_small = 0
    no_block = 0
    no_special = 0
    no_vowel = 0
    no_consonant = 0
    no_numbers = 0

    for lines in stream:
        for word in lines:
            if word in ascii_letters :
                if word in ascii_uppercase : no_block += 1
                if word in ascii_lowercase : no_small += 1
                if word.lower() in ("a","e","i","o","u") : no_vowel += 1
                if word.lower() not in ("a","e","i","o","u") : no_consonant += 1
            elif ord("0") <= ord(word) <= ord("9") : no_numbers += 1
            else : no_special += 1

    return no_small, no_block, no_special, no_vowel, no_consonant, no_numbers

def main():
    filename = input("Please Enter the Path of the File : ") #Enter the full File path (/home/usr/Documents/file1.dat)
    filetype = input("Is it a Text File (Y/n) : ")

    try :
        if filetype.lower() == "y" : file = open(filename)
        elif filetype.lower() == "n" : file = open(filename, "rb")
        else : print("Invalid Choice\nExiting...")

        data = file.readlines()
        no_small, no_block, no_special, no_vowel, no_consonant, no_numbers = count_characters(data)
        print("\nThe File Contains\nNo. of Small Letters : ", no_small)
        print("No. of BLOCK Letters : ", no_block)
        print("No. of Vowels : ", no_vowel)
        print("No. of Consonants : ", no_consonant)
        print("No. of Numbers : ", no_numbers)
        print("No. of Special Characters : ", no_special)

    except FileNotFoundError : print("Oops!!! Such a File does not Exists...")
main()