问将数组内容传入函数时无法正常工作

EN

import items
import npcs.py

def pickup(item):
    global player_weight_max,player_weight,player_inv
    #Calculates if item's weight will make player_weight go over player_weight_max
    if player_weight + item[5] <= player_weight_max:
        player_inv.append(item)
        player_weight = player_weight + item[5]
    else:
        print("You're not able to carry this item.")

def npc(npc):
    #Prints NPC speech
    if npc[2] != None:
        print("".join(npc[1]) + ": " + "".join(npc[2]))
    else:
        pass
    for function in npc[3]:
        if function[0] == 'pickup':
            pickup(function[1])
        if function[0] == 'battle':
            battle(function[1])

import items

#art,name,speech,functions
test_guy = [["art"],["name"],["speech"],[
        [['pickup'],[items.armour[0]],
        [['pickup'],[items.armour[1]],
    ]
]

armour = [
    [str(""),str("Tin Helmet"),int(1),int(20),str("head"),int(2),int(0),int(2)],
    [str(""),str("Tin Chestplate"),int(1),int(20),str("torso"),int(0),int(1),int(2)],
    [str(""),str("Tin Pants"),int(1),int(20),str("legs"),int(3),int(0),int(2)],
    [str(""),str("Tin Boots"),int(1),int(20),str("feet"),int(2),int(0),int(2)],
]

def npc(npc):
    #Prints NPC speech
    if npc[2] != None:
        print("".join(npc[1]) + ": " + "".join(npc[2]))
    else:
        pass
    for function in npc[3]:
        print(function[1][0])
        if function[0][0] == 'pickup':
            pickup(function[1][0])
        if function[0][0] == 'battle':
            battle(function[1][0])

npc(npcs.test_guy)
print(player_inv)

name: speech
['', 'Tin Helmet', 1, 20, 'head', 2, 0, 2]
['', 'Tin Chestplate', 1, 20, 'torso', 0, 1, 2]
[['', 'Tin Helmet', 1, 20, 'head', 2, 0, 2], ['', 'Tin Chestplate', 1, 20, 'torso', 0, 1, 2]]