Assignment05.py

# ------------------------------------------------------------------------ #
# Title: Assignment 05
# Description: Working with Dictionaries and Files
#              When the program starts, load each "row" of data
#              in "ToDoToDoList.txt" into a python Dictionary.
#              Add the each dictionary "row" to a python list "table"
# ChangeLog (Who,When,What):
# Tianyi Wang,05Nov2019,Created started script
# ------------------------------------------------------------------------ #

# -- Data -- #
# declare variables and constants
strFile = "ToDoList.txt"   # An object that represents a file
strData = ""  # A row of text data from the file
dicRow = {}    # A row of data separated into elements of a dictionary {Task,Priority}
lstTable = []  # A dictionary that acts as a 'table' of rows
strMenu = ""   # A menu of user options
strChoice = "" # A Capture the user option selection

# -- Processing -- #
# Step 1 - When the program starts, load the any data you have
# in a text file called ToDoList.txt into a python Dictionary.
f= open(strFile,"r")
for row in f:
    strData = row.split(",")
    dicRow ={"Task":strData[0],"Priority":strData[1].strip()}
    lstTable.append(dicRow)
f.close()
# Step 2 - Display a menu of choices to the user
while (True):
    print("""    
    Menu of Options    
    1) Show current data    
    2) Add a new item.    
    3) Remove an existing item.    
    4) Save Data to File    
    5) Exit Program    
    """)
    strChoice = str(input("Which option would you like to perform? [1 to 5] - "))
    print()  # adding a new line for looks
    # Step 3 - Show the current items in the table
    if (strChoice.strip() == '1'):
        for objRow in lstTable:
            print(objRow)
        continue
    # Step 4 - Add a new item to the list/Table
    elif (strChoice.strip() == '2'):
        strTask = str(input("Enter task: "))
        strPriority = str(input("Enter Priority: "))
        dicRow = {"Task":strTask,"Priority":strPriority.strip()}
        lstTable.append(dicRow)
        for objRow in lstTable:
            print(objRow)
        continue
    # Step 5 - Remove a new item to the list/Table
    elif (strChoice.strip() == '3'):
        del lstTable[len(lstTable)-1]
        print("Successful Deleted!")
        continue
    # Step 6 - Save tasks to the ToDoToDoList.txt file
    elif (strChoice.strip() == '4'):
        f = open(strFile,"w")
        for row in lstTable:
            f.write(row["Task"]+","+row["Priority"]+"\n")
        f.close()
        print("Data Saved!")
        continue
    # Step 7 - Exit program
    elif (strChoice.strip() == '5'):
        print("Exit")
        f.close()
        break  # and Exit the program