Processing a “locale” file with Python (Copy)

Task description:

In this assignment, you will write a Python program vaguely inspired by Unix command locale. Your Python program will parse a file containing information about language “locales” and “charmaps” and will generate output depending on the command line.

Final score : 30/30

Here is my code:

import sys

import os

#Receive all the error messages and force program exiting

def print_error(message):

    print(message)

    sys.exit(1)

#Check the file existance and access

def check_file(file_path):

    if not os.path.exists(file_path):

        print_error(f"Error: File '{file_path}' does not exist.")

    if not os.path.isfile(file_path):

        print_error(f"Error: '{file_path}' is not a file.")

    if not os.access(file_path, os.R_OK):

        print_error(f"Error: File '{file_path}' is not readable.")

#Put the data into diffrent dictionary

def parse_file(file_path):

    locales = {} #The dictionary that store locales

    charmaps = {} #The dictionary that store charmaps

    with open(file_path, 'r') as file:

        for line in file:

            line = line.strip()

            if line:

                parts = line.split(',') #Separate by ','

                if len(parts) == 3:

                    what_kind, language, filename = parts #Tear parts into three different variables

                    if what_kind == 'locale':

                        locales.setdefault(language, []).append(filename)

                    elif what_kind == 'charmap':

                        charmaps.setdefault(language, []).append(filename)

    return locales, charmaps

#Print all messege also check if there's data in dictionary or not

def print_available(all_kind, message):

    if all_kind:

        print(message)

        for one in all_kind:

            print(one)

    else:#if no data in it, print no items

        print("No items available")

def print_language_info(language, locales, charmaps):

    locales_count = len(locales.get(language, []))

    charmaps_count = len(charmaps.get(language, []))

    if locales_count == 0 and charmaps_count == 0:

        print(f"No locales or charmaps in language '{language}'")

    else:

        print(f"Language {language}:")

        print(f"Total number of locales: {locales_count}")

        print(f"Total number of charmaps: {charmaps_count}")

#Print my basic info

def print_author_info():

    print("Author: Ming-You Chen")

    print("Student ID: 24603704")

    print("Date of Completion: 13.05.2024")

def main():

    #Make sure user input correctness

    if len(sys.argv) < 3 or len(sys.argv) > 4:

        print_error("Error: Incorrect syntax")

    #Get option and argument file

    option = sys.argv[1]

    file_path = sys.argv[-1]

    #Check file vailadation

    check_file(file_path)

    #Put the data into diffrent dictionary

    locales, charmaps = parse_file(file_path)

    #Doing action with different option

    if option == '-a':

        print_available(locales.values(), "Available locales:")

    elif option == '-m':

        print_available(charmaps.values(), "Available charmaps:")

    elif option == '-l':

        if len(sys.argv) != 4:#-l option needs one more argument

            print_error("Error: Missing language argument")

        language = sys.argv[2]

        print_language_info(language, locales, charmaps)

    elif option == '-v':

        print_author_info()

    else:

        print_error("Error: Invalid option")

# execute main() only if the script is run directly

if __name__ == "__main__":

    main()