Python - IndexError: Tupel Index außerhalb des Bereichs

Question

Ich versuche, ein Programm zu erstellen, um zufällig jede Frage aus einem Thema für meine GCSE-Revision zu generieren. Mein Code generiert eine Fehlermeldung nach einer zufälligen Frage. Hier ist mein Code von der Fehlermeldung folgt:

computing_UNIT4_networks = (["LOCAL AREA NETWORK","A network in one geographical area."],["WIDE AREA NETWORK","A network spanning two or more geographical areas."],["ROUTER","Connects a network to another network, sends and inspects packets of data."],["SWITCH","Channels data to its indented destination, within an internal network."],["NETWORK INTERFACE CARD","A card that allows a computer to connect to the network."],["FIBRE OPTIC CABLE","Uses light to transmit data."],["ETHERNET CABLE","Uses metal wires (usually copper) to transmit data."],["DNS","Used to match IP addresses to URL."],["HOSTING","Storing data for a user, usually a website."],["CLOUD COMPUTING","A remote computer is used to store data and provide services."]) 
computing_UNIT5_protocols = (["STAR NETWORK","All computers are connected 'individually' to the server.(using switches)"],["FULL MESH NETWORK","Every computer is connected to every other."],["ENCRYPTION","Disguising data so that it can be read with the key."],["DATA PACKET","Small unit of data to be transmitted."],["LATENCY","The delay in receiving data."],["BANDWIDTH","The amount of data that can be transmitted in a set amount of time."],["PACKET SWITCHING","Packets of data are transmitted and are able to take individual routes to their destination."],["CIRCUIT SWITCHING","Packets of data are transmitted along the same route to their destination."]) 
done = [] 
def computing(): 
    unit = int(input("Which UNIT are you revising?\n-")) 
    if unit == 4: 
     UNIT = computing_UNIT4_networks 
     print("Here are",len(UNIT),"questions on UNIT4 - Wired and wireless networks.") 
    elif unit == 5: 
     UNIT = computing_UNIT5_protocols 
     print("Here are",len(UNIT),"questions on UNIT5 - Network topologies, protocols and layers.") 
    i=1 
    c=0 
    while i <= (len(UNIT)): 
     import random 
     randint=random.randint(0,len(UNIT)) 
     while randint in done: 
      randint=random.randint(0,len(UNIT)) 
      if randint in done: 
       i=i 
      else: break 
     question = UNIT[randint][1] 
     answer = UNIT[randint][0] 
     print("\nWhat is this the definition of?:",question) 
     b=input("-").upper() 
     if b == answer: 
      c=c+1 
      print("\nCorrect\nCurrent score:",c,"/",i) 
     else: print("\nWrong. The answer was",answer,".\nCurrent score:",c,"/",i) 
     done.append(randint) 
     i = i+1 
    print("\nYou scored",c,"/",len(UNIT),".") 

computing() 

Fehlermeldung:

Traceback (most recent call last): 
    File "<pyshell#0>", line 1, in <module> 
    computing() 
    File "[FILELOCATION]", line 22, in computing 
    question = UNIT[randint][1] 
IndexError: tuple index out of range 

Answer 1

randint 0-len(UNIT)-1 gehen sollte. Der Wert erreicht wahrscheinlich zufällig die len(UNIT) und dieser Index ist außerhalb der Grenzen.