Question

我想从字典中找到武器1，然后打印其“键”和“值”对，以便我分别引用它们。这适用于字典中的所有项目，但是当我只想要一个项目时，我似乎无法使其正常工作。

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，我了解它调用的是武器1的值（即“ int”），但是我想从字典中找到的项中调用键和值。任何帮助，将不胜感激！

Answer 1

您的selecteditem是值45，然后尝试遍历selecteditem，但这只是一个整数，因此出现错误：

for k, v in inventoryitems.items():
    print(k, v)

Answer 2

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

Answer 3

由于您已经拥有密钥weapon1，因此您实际上只需要一个值，因为您已经为其分配了selectedItem，所以该值已经存储在inventoryitems["weapon1"]中。这里不需要任何进一步的调用或迭代。

从字典中的选定项目中打印键值

3 个答案: