filename = raw_input("Enter file name> ")
current_file = open(filename, 'a')
current_file.write("\n")
source = []
cost = []
combined = [source + cost]

def start():
    print("To add entry press 1.")
    print("To view entries press 2.")
    print("To amend an entry press 3.")
    print("To close press 4.")

    option = raw_input("Enter option> ")
    if option == "1":
        add()
    elif option == "2":
        viewed()
#    elif option == "3":
#        amend()
    elif option == "4":
        current_file.close()
        exit(0)
    else:
        current_file.close()
        exit(0)

def add():
    date_entry = raw_input("Enter date(dd/mm/yy), x to cancel or 0 to return> ")
    s = str(date_entry)
    if len(date_entry) > 1:
        current_file.write(s)
        current_file.write("\n")
        place()
    elif date_entry == "0":
        current_file.close()
        start()
    elif date_entry == "x" or "X":
        current_file.close()
        exit(0)
    else:
        start()

def place():
    pos = raw_input("Enter place of spend, x to cancel or 0 to return> ")
    s = str(pos)
    if len(pos) > 1:
        source.extend(s)
        spend()
    elif pos == "0":
        current_file.close()
        start()
    elif pos == "x" or "X":
        current_file.close()
        exit(0)
    else:
        start()

def spend():
    amount = raw_input("Enter amount spent, x to cancel or 0 to return> ")
    s = str(amount)
    if amount > 0.01:
        cost.extend(s)
        current_file.write(combined)
        place()
    elif amount == "0":
        start()
    elif amount == "x" or "X":
        current_file.close()
        exit(0)
    else:
        start()

#def amend():
#    current_file = open(filename, 'r')
#    for lines in current_file:
#       print lines
#        current_file.close()


def viewed():
    opened = current_file
    for i in opened:
        print i
        start()

start()