First Python project. Command line show database.

[John A.]

Hey guys, this is my first project since I completed CodeAcademy's Python course yesterday. Besides that course, this is my first time programming and I would really appreciate input on my program. I decided to create a database to help me keep track of the anime I watch. For this project I only used what was taught in the CodeAcademy course except for the webbrowser module.

import webbrowser

all_commands = {
    "ls": "  Lists all DataBase entries.",
    "add": " Add entries to DataBase.",
    "del": " Delete specified entry.",
    "edit": "Edit specified entry.",
    "open": "Open specified entry.",
    "web": " Open specified entry in web browser.",
    "help": "Displays these commands."
    }

class Anime(object):
    title = ""
    total_episodes = 0
    genres = ""
    current_episode = 0
    description = ""
    def __repr__(self): ## Format for print
        return (" Title: %s\n Episodes: %s/%s\n Genres: %s\n Description: %s") % (self.title,self.current_episode,self.total_episodes,self.genres,self.description)
    def add_to_file(self): ## Format used to write entry to file
        return ("%s|%s|%s|%s|%s\n" % (self.title,self.current_episode,self.total_episodes,self.genres,self.description))
    def from_file_data_format(self, data_list):
        self.title = data_list[0]
        self.current_episode = int(data_list[1])
        self.total_episodes = int(data_list[2])
        self.genres = data_list[3]
        self.description = data_list[4]

## get title of anime to be used in other functions
def get_title(command_list):
    if len(command_list) > 1:
        title = "-".join(command_list[1::]).lower()
    else:
        title = raw_input("Title of Anime?\n>>").lower()

    return title

## open anime in default browser using waoanime.tv
def open_in_web_browser(command_list):
    if len(command_list) > 1:
        title = "-".join(command_list[1::]).lower()  ## convert given title to proper format e.g(this-is-a-title)
    else:
        title = "-".join(raw_input("Title of anime?\n>>").split(" ")).lower() ## ask user for title and convert to proper format
    webbrowser.open_new_tab("http://waoanime.tv/anime/%s/" % (title))

## delete entry from file
def delete_entry(command_list):
    title = get_title(command_list)

    data_file = open("AnimeDataBase.txt", "r")
    lines = data_file.readlines()
    data_file.close()

    data_file = open("AnimeDataBase.txt", "w")
    for line in lines:
        data_list = line.split("|")
        if data_list[0].lower() != title:
            data_file.write(line)
    data_file.close()

## edit an entry in the database
def edit_entry(command_list):
    title = get_title(command_list)
    data_list = []
    edited_entry = Anime()

    ## print current information for specified entry, save to class variable, and delete it from database.
    data_file = open("AnimeDataBase.txt", "r")
    lines = data_file.readlines()
    data_file.close()

    data_file = open("AnimeDataBase.txt", "w")
    for line in lines:
        data_list = line.split("|")
        if data_list[0].lower() != title and data_list[0] != "\n":
            data_file.write(line)
        elif data_list[0].lower() == title:
            edited_entry.from_file_data_format(data_list)        
    data_file.close()

    print edited_entry

    ## get data from user used to edit entry
    entry_variable = raw_input("What would you like to edit?(title, episodes, genres, description)\n>>").lower()
    if entry_variable == "title":
        edited_entry.title = raw_input("What is the new title\n>>")
    elif entry_variable == "episodes":
        entry_variable = raw_input("Current or total?\n>>").lower()
        if entry_variable == "total":
            edited_entry.total_episodes = int(raw_input("Number of total episodes.\n>>"))
        else:
            edited_entry.current_episode = int(raw_input("Current episode.\n>>"))
    elif entry_variable == "genres":
        endited_entry.genres = raw_input("What genres does this belong to?(seperated by a space)\n>>")
    elif entry_variable == "description":
        edited_entry.description = raw_input("Description of Anime.\n>>")

    ## append edited entry to database file
    data_file = open("AnimeDataBase.txt", "a")
    data_file.write(edited_entry.add_to_file())
    data_file.close()

## list entries in database
def list_entries(command_list):
    ## check if command has arguments. if so, run open with intended arguments e.g(c = list entries that are completed)
    if len(command_list) > 1:
        if command_list[1][0] == "-":
            data_list = []
            arguments = command_list[1][1::].lower()

            data_file = open("AnimeDataBase.txt", "r+")
            for line in data_file.readlines():
                data_list = line.split("|")
                for arg in arguments:
                    if arg == 'c':
                        if data_list[1] == data_list[2]:
                            print "%s %s episodes" % (data_list[0], data_list[2])
                    if arg == 'i':
                        if data_list[1] != data_list[2]:
                            print "%s %s/%s episodes" % (data_list[0], data_list[1], data_list[2])
                    if arg == 'a':
                        old_entry = Anime()
                        old_entry.from_file_data_format(data_list)
                        print old_entry
            data_file.close()
        else:
            print ("Improper syntax")
    ## list all titles in database and number of entries
    else:
        data_file = open("AnimeDataBase.txt", "r+")
        total_entries = 0
        for line in data_file.readlines():
            data_list = line.split("|")
            print data_list[0]
            total_entries += 1
        print ("There are %s entries in the DataBase") % (total_entries)
        data_file.close()

## open specific database entry and print all information to screen
def open_entry(command_list):
    title = get_title(command_list)
    data_list = []

    data_file = open("AnimeDataBase.txt", "r+")
    for line in data_file.readlines():
        data_list = line.split("|")
        if data_list[0].lower() == title:
            break
    data_file.close()

    old_entry = Anime()
    old_entry.from_file_data_format(data_list)
    print old_entry

## adds entry to database using Anime class to get information from user
def add_entry(command_list):
    new_entry = Anime()
    new_entry.title = raw_input("What is the title?\n>>")
    new_entry.total_episodes = int(raw_input("How many episodes are there?\n>>"))
    new_entry.current_episode = int(raw_input("How many episodes have you watched?\n>>"))
    new_entry.genres = raw_input("What genres does this belong to?(seperated by a space)\n>>")
    new_entry.description = raw_input("Description of Anime.\n>>")

    data_file = open("AnimeDataBase.txt", "a")
    data_file.write(new_entry.add_to_file())
    data_file.close()

## lists the all_command dictionary, will eventually display arguments for specified command
def help(command_list):
    if len(command_list) > 1:
        print ("This will later list arguments for specific commands")   
    else:
        for key in all_commands:
            print key, all_commands[key]

## parses the command string into a list
def command_parser(command):
    return command.split(" ")

## runs specified command's function
def command_interpreter(command):
    command_list = command_parser(command)
    if command_list[0] == "help":
        help(command_list)
    elif command_list[0] == "add":
        add_entry(command_list)
    elif command_list[0] == "open":
        open_entry(command_list)
    elif command_list[0] == "ls":
        list_entries(command_list)
    elif command_list[0] == "web":
        open_in_web_browser(command_list)
    elif command_list[0] == "del":
        delete_entry(command_list)
    elif command_list[0] == "edit":
        edit_entry(command_list)
    else:
        print ("Command is not recognized")


## Start of program, gets commands from user
command = raw_input("Welcome to your Anime DataBase. \n >>").lower()
while command != "exit":
    command_interpreter(command)
    command = raw_input(">>").lower()

What's your opinion on it? How do you think I could improve it?

Things I know I should fix:
1. When editing an entry, you can add an entry with the base Anime class values. If/else statements can fix it.
2. Because of the way I handled commands in a list, the program can crash if you don't supply a value to certain functions. command_list[n] out of range.

Where could I find a good resource on GUI's and encryption/decryption of file IO?
And last question, what should I do next? Should I continute coding in python for a while, or try to learn a new language?

Thanks for reading and for any input you may give.

[Gribouillis]

You can improve the program by using the standard module cmd which purpose is to write interactive command line interpreters. I wrote an enhanced class of cmd.Cmd in this code snippet. It makes it very easy to write an interpreter: copy the class ExampleCmd at the end of the file and add methods do_ls() do_add() do_open() etc with arguments and docstring. The help command is automatically provided.