12_01_Function_Arguments.py

# https://www.udemy.com/course/the-python-mega-course/learn/lecture/34597846#overview

from num2words import num2words

# Best practice is to define custom functions outside a loop.

# New code - adding arguments to our custom functions

# with open("12_Save.txt","w"):
#     pass
# ^^^ Include this code to create a new savefile

def get_save(filepath):
    with open(filepath, "r") as savefile_local:
        todos_local = savefile_local.readlines()
    return todos_local

def write_save(filepath, todos_arg):
    with open(filepath,"w") as savefile_local:
        savefile_local.writelines(todos_arg)

# These two above are LOCAL variables because they're defined _within_ a function.

while True:
    user_decision_base = input("Type either Add, Show, Edit, Complete, Reset or Exit:")
    user_decision = user_decision_base.strip().casefold()
    list_decision = user_decision.split()

    todos = get_save(filepath="12_Save.txt") # Including the parameter is optional. It'll assign arguments to parameters by sequential order, like R does.
    todo = ()

    # if "add" in user_decision or "new" in user_decision: old method
    # if user_decision.startswith("add"): # technique suggested in the video
    if list_decision[0] == "add": # my technique, it also works.
        if len(list_decision) > 1:
            todo = user_decision_base[4:] +"\n" # This is the first bug we were "supposed" to fix.
        else:
            todo = input("Enter a To-Do Item:") + "\n"

        todos = get_save("12_Save.txt")

        todos.append(todo)

        write_save("12_Save.txt",todos)
        # with open("12_Save.txt", "w") as savefile:
        #     savefile.writelines(todos)
        #     todo = todo.rstrip()

        print(f"Item {todo.rstrip()} added to your To-Do List.")

    elif user_decision.startswith("show"):

        print()
        for index, item in enumerate(todos):
            item = item.rstrip()
            row = f"{index + 1}: {item}"
            print(row)
        print(f"\nYour To-Do List is {num2words(len(todos))} items long.")
        print()

    elif user_decision.startswith("edit"): # I guess I might have to add the if loop to let the user type edit 5 directly...
        if len(list_decision) > 1:
            try:
                number = int(user_decision[5:])
                number = number-1

                if number < 0 or user_decision[5:] == 0:
                    raise IndexError

                todos = get_save("12_Save.txt")

                new_todo = input(f"Please enter the To-Do Item you wish to replace the current item:\n {todos[number].rstrip()}.")
                todos[number] = new_todo + "\n"
                print(f"Your new To-Do Item is {todos[number].rstrip()}.")

                write_save("12_Save.txt",todos)

            except ValueError:
                print(
                    "A non-integer response was provided. Please type Edit again, then enter the number of the To-Do Item you wish to edit.")
            except IndexError:
                print(
                    "You have entered a number outside the range of To-Do Items in your To-Do List. "
                    "Please type Edit again, then enter the number of the To-Do Item you wish to edit."
                )
        else:
            while True:

                for index, item in enumerate(todos):
                    item = item.rstrip()
                    row = f"{index + 1}: {item}"
                    print(row)

                try:
                    number = int(input("Please enter the number of the To-Do Item you wish to edit:"))
                    number = number - 1

                    if number < 0 or user_decision[5:] == 0:
                        raise IndexError

                    todos = get_save("12_Save.txt")

                    # Two ways of printing a variable in a line of code. Here's way #1, old school way.
                    print("You selected {}.".format(todos[number].rstrip()))

                    new_todo = input("Please enter the To-Do Item you wish to replace this item:")
                    todos[number] = new_todo + "\n"

                    # Here's the easier way to do it, as an "f-string literal" as auto-recommended by PyCharm.
                    print(f"Your new To-Do Item is {todos[number].rstrip()}.")

                    write_save("12_Save.txt",todos)
                    break

                except ValueError:
                    print("A non-integer response was provided. Please provide an integer response.")
                except IndexError:
                    print(
                        "You have entered a number outside the range of To-Do Items in your To-Do List. "
                    )

    elif user_decision.startswith("complete"):
        if len(list_decision) > 1:
            try:
                number = int(user_decision[8:])
                number = number-1

                if number < 0 or user_decision[8:] == 0:
                    raise IndexError
                else:
                    removed = todos[number].rstrip()
                    todos.pop(number)

                write_save("12_Save.txt",todos)

                message = f'To-Do Item "{removed}" was marked as complete, and thus removed from the list.'
                print(message)

            except ValueError:
                print(
                    "A non-integer response was provided. Please type Complete again, then enter the number of the To-Do Item you wish to mark as Complete.")
            except IndexError:
                print(
                    "You have entered a number outside the range of To-Do Items in your To-Do List. "
                    "Please type Complete again, then enter the number of the To-Do Item you wish to mark as completed."
                )
        else:
            while True:

                for index, item in enumerate(todos):
                    item = item.rstrip()
                    row = f"{index + 1}: {item}"
                    print(row)
                try:
                    number = int(input("See your current To-Do Items Above.\nPlease enter the number of the To-Do Item you wish to mark as completed."))
                    number = number-1

                    if number < 0 or user_decision[8:] == 0:
                        raise IndexError

                    else:
                        removed = todos[number].rstrip()
                        todos.pop(number)

                    write_save("12_Save.txt", todos_arg=todos)

                    message = f'To-Do Item "{removed}" was marked as complete, and thus removed from the list.'
                    print(message)
                    break

                except ValueError:
                    print("A non-integer response was provided.")
                    continue
                except IndexError:
                    print(
                        "You have entered a number outside the range of To-Do Items in your To-Do List. "
                    )

    elif user_decision.startswith("reset"):
        reset_choice = input("Continuing with Reset will erase all items from your To-Do List,\nleaving it totally blank. Continue?\nType YES if certain.")
        reset_choice = reset_choice.strip().casefold()

        if reset_choice == "yes":
            with open("12_Save.txt", "w+") as savefile:  #wow, w+ is dope
                savefile.write("")
                todos = savefile.readlines()

            print("Your To-Do List has been reset.")
            print(f"Your To-Do List is {num2words(len(todos))} items long.")

        else:
            print("Reset aborted.")

    elif "exit" in list_decision[0]:
        break

    else:
        print("You entered an unknown command.\n"
        "Please type either Add, Show, Edit, Complete, Reset or Exit:")

print("Good bye!")