3_2_11 Structured Programming

def enterReg(): #user enters the registration

    lengthCheck = ""

    first2Letters = ""

    first2region = ""

    fthLetterspace = ""

    second2year = ""

    lastThree = ""

    print ("Enter a registration number to authenticate")

    registration=input().upper()

    print ("You entered..."+registration)

    print ("Is this correct? Y / N")

    answer = input().upper()

    while answer not in ["Y","N"]:

        print ("You must enter Y or N")

        answer = input()

    if answer == "Y":

        trueCount=0

        print ("Registration Entered")

        print ("Authentication started")

        lengthCheck=(checkLength(registration,lengthCheck))

        if lengthCheck==True:

            trueCount+=1

        print ("Registration Correct Length: "+str(lengthCheck))

        first2Letters=(f2Letters(registration,first2Letters))

        if first2Letters==True:

            trueCount+=1

        print ("First two characters are letters: "+str(first2Letters))

        first2region=(f2Region(registration,first2region))

        if first2region==True:

            trueCount+=1

        print ("The region is valid: "+str(first2region))

        second2year=(s2Year(registration,second2year))

        if second2year==True:

            trueCount+=1

        print ("The year is valid: "+str(second2year))

        fthLetterspace=(fthSpace(registration,fthLetterspace))

        if fthLetterspace==True:

            trueCount+=1

        print ("The 5th Letter is a Space: "+str(fthLetterspace))

        lastThree=(lstThree(registration,lastThree))

        if lastThree==True:

            trueCount+=1

        print ("The last three characters are letters: "+str(lastThree))

        if trueCount==6:

            print ("Registration Number is Authentic")

        else:

            print ("Registration Number is Fake")

    else:

        enterReg()

def quitApp(): #quits the program

    print ("Are you sure you want to quit? Y / N")

    answer=input().upper()

    while answer not in ["Y","N"]:

        print ("You must type Y or N")

        answer=input().upper()

    if answer=="Y":

        quit()

    else:

        menu()

def checkLength(registration,lengthCheck): #checks if the reg is the length is 8 characters

    regLength = (len(registration))

    if regLength!=8:

        lengthCheck=False

    else:

        lengthCheck=True

    return lengthCheck

def f2Letters(registration,first2Letters): #checks the first two are letters

    checkLetters=[]

    firstTwo=(registration[0:2])

    for letter in firstTwo:

        alphabet=letter.isalpha()

        checkLetters.append(alphabet)

    if checkLetters[0]==True and checkLetters[1]==True:

        first2Letters = True

    else:

        first2Letters = False

    return first2Letters

def f2Region(registration,first2region): #checks the first two are in a valid region

    firstTwo=(registration[0:2])

    f = open('validregion.txt', 'r')

    first2region = False

    for line in f:

        lineFirstTwo=line[0:2]

        if lineFirstTwo==firstTwo:

            first2region=True

    return first2region

def s2Year(registration,second2year): #checks if the second two are a valid year

    secondTwo=str(registration[2:4])

    f = open('validyear.txt', 'r')

    second2year = False

    for line in f:

        lineSecondTwo=str(line[0:2])

        if lineSecondTwo==secondTwo:

            second2year=True

    return second2year

def fthSpace(registration,fthLetterspace): #checks if the fifth letter is a space

    fthLetter=(registration[4])

    if fthLetter == " ":

        fthLetterspace=True

    else:

        fthLetterspace=False

    return fthLetterspace

def lstThree(registration,lastThree): #checks if the last three are letters

    three = registration[5:8]

    letterCount=0

    for letter in three:

        if letter.isalpha():

            letterCount+=1

    if letterCount == 3:

        lastThree=True

    else:

        lastThree=False

    return lastThree

def menu(): #menu system

    print ("Welcome to the License Authentication Application")

    print ("-------------------------------------------------")

    print ("Choose an option:")

    print ("1. Enter a Registration")

    print ("2. Quit")

    print ("Enter an option number...")

    option=input()

    while option not in ["1","2"]:

        print ("Enter either 1 or 2")

        option=input()

    if option=="1":

        enterReg()

    elif option=="2":

        quitApp()

menu()