python - 打印字典中所选项目的键值

Question

我想从字典中找到 Weapon1，然后打印它的“键”和“值”对，以便我可以单独引用它们。这适用于字典中的所有项目，但当我只想要一个项目时，我似乎无法使其工作。

inventoryitems = {"weapon1": 45, "weapon2": 5}

selecteditem = inventoryitems["weapon1"]
print(selecteditem)

for k, v in selecteditem():
    print(k, v)

我收到此错误代码:

TypeError: 'int' object is not callable

到目前为止，我了解它调用 Wea​​pon1 的值(即“int”)，但我想从字典中找到的项目中调用键和值。对此的任何帮助将不胜感激!

Answer 1

inventoryitems = {"weapon1": 45, "weapon2": 5}

selecteditem = inventoryitems["weapon1"]
# by doing this you have assigned the value of key( = weapon1) to the variable selecteditem
# since this value was int now your selecteditem is int

print(selecteditem) # will print 45

# but now you are try to call selecteditem which is an int, and you can't call an int so python will give you an error

'''
for k, v in selecteditem():
    print(k, v)

'''

# instead do this 

selecteditem, selecteditem_value = 'weapon1', inventoryitems["weapon1"]

print('you selected {0} and its power is {1}'.format(selecteditem, selecteditem_value)) #you selected weapon1 and its power is 45

编辑:

inventoryitems = {"weapon1": 45, "weapon2": 5}

def user_selection( item_selected):
    print('you selected {0} and its power is {1}'.format(item_selected, inventoryitems[item_selected])) #you selected weapon1 and its power is 45


user_selection( 'weapon1') # you selected weapon1 and its power is 45