Project 1 - English Dictionary App & Library Book Management System

#1. Database-Software Interface

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import pickle #serialization package

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def saveDictionary(tmp_dict):

    '''

    This function recives a python dictionary,

    and saves it to a serialized file words.txt

    '''

    try:

        # 'wb' means open file with writing binary mode

        with open('words.txt', 'wb') as dictionary:

            pickle.dump(tmp_dict, dictionary)

        # dictionary = open('words.txt', 'wb')

        # pickle.dump(tmp_dict, dictionary)

        # dictionary.close()

        print("SUCCESS: writing to dictionary words.txt")

    except Exception as e:

        print(f"ERROR: {e}")

​

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def getDictionary():

    '''

    This function returns a python dictionary,

    after de-serializing the file words.txt

    '''

    try:

        # 'rb' means open file with reading binary mode

        with open('words.txt', 'rb') as dictionary:

            tmp_dict = pickle.load(dictionary)

        print("SUCCESS: reading from dictionary words.txt")

        return tmp_dict

    except Exception as e:

        print(f"ERROR: {e}")

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#2. User-Software Interface

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def addNewWord():

    '''

    This function provides functionalities for n==1,

    that is, it creates a new word in the dictionary

    '''

    print("__________")

    print("NEW WORD ADDER:")

    print("__________")

    print("Enter a Word to add")

    word = input(">>")

    print(f"Enter a meaning of {word} to add")

    meaning = input(">>")

    dictionary = getDictionary()

    dictionary[word] = meaning

    saveDictionary(dictionary)

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    # after the work of this function is done, we need to go back to the menu

    main_menu()

def findMeaning():

    '''

    This function provides functionalities for n==2,

    that is, it finds a word in the dictionary

    '''

    print("__________")

    print("WORD FINDER:")

    print("__________")

    print("Enter a Word to find")

    word = input(">>")

    dictionary = getDictionary()

    # check if the word exists

    # if it does, print its meaning

    if word in dictionary:

        print(f"Found Entry: [{word} : {dictionary[word]}]")

    else:

    # otherwise throw an error and go back to the submenu of findMeaning()

        print("ERROR: The word doesn't exist!")

        findMeaning()

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    # after the work of this function is done, we need to go back to the menu

    main_menu()

def updateWord():

    '''

    This function provides functionalities for n==3,

    that is, it updates a word in the dictionary

    '''

    print("__________")

    print("WORD UPDATER:")

    print("__________")

    print("Enter an old Word to edit")

    word = input(">>")

    # check if the word exists

    # if it does, update it

    dictionary = getDictionary()

    if word in dictionary:

        print(f"Enter a New Meaning to edit [{word} : {dictionary[word]}] to:")

        new_meaning = input(">>")

        dictionary[word] = new_meaning

        saveDictionary(dictionary)

        print(f"SUCCESS: Updated to [{word} : {dictionary[word]}]")

    else:

    # otherwise throw an error and go back to the submenu of updateWord()

        print("ERROR: The word doesn't exist! impossible to update!")

        updateWord()

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    # after the work of this function is done, we need to go back to the menu

    main_menu()

def main_menu():

    '''

    This function prints Main Menu:

    __________

    ENGLISH DICTIONARY APP

    __________

    1. Add a new word

    2. Find the meaning

    3. Update a word

    4. Exit

    __________

    '''

    print("__________")

    print("ENGLISH DICTIONARY APP")

    print("__________")

    print("1. Add a new word")

    print("2. Find the meaning")

    print("3. Update a word")

    print("4. Exit")

    print("__________")

    # n is a way to choose items from the menu

    n = int(input(">>"))

    if n==1:

        # if n==1 call the function that asks for a new word to save

        addNewWord()

    elif n==2:

        # if n==2 call the function that asks for a word to search

        findMeaning()

    elif n==3:

        # if n==3 call the function that asks for which word to edit

        updateWord()

    elif n==4:

        # if n==4 then exit the program

        exit()

    else:

        # otherwise, show the error, and print the menu again

        print("ERROR: Please Enter a digit according to Menu.")

        main_menu()

​

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# Script to Run

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main_menu() # to initiate the program

#print(getDictionary())

#dictionary = {}

#saveDictionary(dictionary)

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