main.py

from sys import argv
import errno
# Consts
ARGC = len (argv)

def get_book_text(path):
	with open(path) as f:
		return f.read()

def count_words(book_content):
	return len(book_content.split())

def count_chars(book_content):
    return len (book_content)



def report_char_frequency(book_content):
    book_content = book_content.lower()
    unique_chars = {}
    alphabet = "abcdefghijklmnopqrstuvwxyz"
    for char in book_content:
        if char not in alphabet:
            continue

        if char not in unique_chars:
            unique_chars[char] = 1
            continue
        
        unique_chars[char] += 1
    # sort the dict
    return dict(sorted(unique_chars.items(), key=lambda item: item[1], reverse=True))


def __main__():
    print("Hello world!")
    if (ARGC == 1):
        print(f"Usage: ./{argv[0]} [book path]")
        return exit(errno.EINVAL)
    if (ARGC > 3):
        print(f"Usage: ./{argv[0]} [book path]")
        print("E2BIG error 7")
        return exit(errno.E2BIG)
    
    book_content = get_book_text(argv[1])
    print(f"                                                        ")
    print(f"            Generating report for {argv[1]}             ")
    print(f"                                                        ")
    print(f"")
    print(f" {argv[1]} contains {count_words(book_content)} words.  ")
    print(f" {argv[1]} contains {count_chars(book_content)} letters ")
    print(f"")
    print(f"           Reporting character frequency                ")
    print(f"                                                        ")

    char_frequency = report_char_frequency(book_content)
    for char_key in char_frequency:
        print(f" {char_key} was found {char_frequency[char_key]} times. ")


if __name__ == "__main__":
    __main__()