我收到IndexError：列表索引超出范围

Question

Error

File "D:/hotel2.py", line 11, in addGuest guests[i].append(name) IndexError: list index out of range

hotel2.py

def addGuest():
    i = 0
    j = 0
    global guestid
    name = input("Please enter guest name:\n")
    guests[i].append(name)
    guests[j].append(guestid)
    print("Guest %s has been created with guest ID: %d" % (guests[i], guests[j]))
    i += 1
    j += 1
    guestid += 1

What I really want to do is store guestid and guestname in a way that I can display the guestname when I enter guestid . But this function is not letting me do it.

Answer 1

You better use dictionary for key:value pairs than two lists:

guestid2name = {}

def addGuest():
    name = raw_input('enter guest name:\n')
    global guestid
    guestid2name[guestid] = name
    print("Guest %s has been created with guest ID: %d" % (name, guestid))

This will create guestid2name data structure of guestid's with the guest's name as value. It is much more efficient than using two distinct lists to achieve the same thing.