Question

In this python script find any bugs and errors which would cause the code to crash. The code must be re-written correctly.

After debugging make a separate list of all the errors you found in the script.

contacts_list=[] # global variable, list of contacts_list, one string per contact

def pause()
    """ pauses program e.g. to view data or message """
    input("press enter to continue")

def load():
    """ populate list with data """  
  
    contacts_list.append(('Milo ', '063847489373'))
  
    contacts_list.append(('Tony', '46483848')
  
    contacts_list.append(('Betty' '03747384043'))
  
    print("%s records have been loaded" %(len(contacts_list)))
  

add():
    """ adds contact to list """
    name = input("enter name : ")
    phone_no = int(input("enter phone number : "))
    contacts_list.append(((phone_no, name)))

def view():
    """ displays contacts_list """
    index = 0
    for contact in contacts_list:
        print(index," ",contact[0], " ", contact[2])
        index += 1
    pause()

def delete():
    """ removes contact based upon index """
    index=input("enter index of contact to delete ")
    del contacts_list[index-1]

def menu():
    """ loops menu of options and does these until user quits """
    while True:
        print("")
        print(" enter for option")
        print(" =   ==========")
        print(" v   view contacts_list")
        print(" a   add contact")
        print(" d   delete contact")
        print(" q   quit")
        option=input("your option: ")
        optoin=option.lower() # always lower case
        if option == "v":
            #view()
        elif option == "d":
            delete()
        elif option == "a":
            add()
        elif option == "q":
            return # exit while loop and menu function
        else:
            print("invalid menu option")
            pause()

def main():
    """ entry point if module imported or run as script """
    load()
    menu()

if __name__ == "__main__":
    # runs program if executed as a script
    main()

Answer 1

contacts_list=[] # global variable, list of contacts_list, one string per contact

def pause():#**Didnt have colon
    """ pauses program e.g. to view data or message """
    input("press enter to continue")

def load():
    """ populate list with data """

    contacts_list.append(('Milo ', '063847489373'))

    contacts_list.append(('Tony', '46483848'))

    contacts_list.append(('Betty' ,'03747384043'))#**No comma separating the values of the tuple

    print("%s records have been loaded" %(len(contacts_list)))

def add():# No def
    """ adds contact to list """
    name = input("enter name : ")
    phone_no = int(input("enter phone number : "))
    contacts_list.append(((name, phone_no)))#**Order of name and phone_no flipped

def view():
    """ displays contacts_list """
    index = 0
    for contact in contacts_list:
        print(index," ",contact[0], " ", contact[1])#**print contact[0] and contact[1], not contact[2]
        index += 1
    pause()

def delete():
    """ removes contact based upon index """
    index=int(input("enter index of contact to delete "))#**need to convert index to int since input returns a string
    del contacts_list[index]#**Delete index value since it starts from 0.No need for index-1

def menu():
    """ loops menu of options and does these until user quits """
    while True:
        print("")
        print(" enter for option")
        print(" =   ==========")
        print(" v   view contacts_list")
        print(" a   add contact")
        print(" d   delete contact")
        print(" q   quit")
        option=input("your option: ")
        option=option.lower() # always lower case.**option incorrectly written as optoin
        if option == "v":
            view()#**required code was commented
        elif option == "d":
            delete()
        elif option == "a":
            add()
        elif option == "q":
            return # exit while loop and menu function
        else:
            print("invalid menu option")
            pause()

def main():
    """ entry point if module imported or run as script """
    load()
    menu()

if __name__ == "__main__":
    # runs program if executed as a script
    main()

'''The corrections done have been added as a single line comment adjacent to the line they were found starting with '**'. Eg "#**required code was commented"'''