Python 类型错误：“浮动”对象不可下标
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TypeError: 'float' object is not subscriptable
提问by beardo
PizzaChange=float(input("What would you like the new price for all standard pizzas to be? "))
PriceList[0][1][2][3][4][5][6]=[PizzaChange]
PriceList[7][8][9][10][11]=[PizzaChange+3]
Basically I have an input that a user will put a number values (float input) into, then it will set all of these aforementioned list indexes to that value. For some reason I can't get it to set them without coming up with a:
基本上我有一个输入，用户将把一个数字值（浮点输入）放入其中，然后它将所有这些上述列表索引设置为该值。出于某种原因，我无法在不提出以下问题的情况下设置它们：
TypeError: 'float' object is not subscriptable
error. Am I doing something wrong or am I just looking at it the wrong way?
错误。是我做错了什么还是我只是用错误的方式看待它？
采纳答案by Joshua
PriceList[0]is a float. PriceList[0][1]is trying to access the first element of a float. Instead, do
PriceList[0]是一个浮点数。PriceList[0][1]正在尝试访问浮点数的第一个元素。相反，做
PriceList[0] = PriceList[1] = ...code omitted... = PriceList[6] = PizzaChange
or
或者
PriceList[0:7] = [PizzaChange]*7
回答by Pruthvikar
You are not selecting multiple indexes with PriceList[0][1][2][3][4][5][6] , instead each [] is going into a sub index.
您没有使用 PriceList[0][1][2][3][4][5][6] 选择多个索引，而是每个 [] 都进入一个子索引。
Try this
尝试这个
PizzaChange=float(input("What would you like the new price for all standard pizzas to be? "))
PriceList[0:7]=[PizzaChange]*7
PriceList[7:11]=[PizzaChange+3]*4
回答by roippi
PriceList[0][1][2][3][4][5][6]
This says: go to the 1st item of my collection PriceList. That thing is a collection; get its 2nd item. That thing is a collection; get its 3rd...
这说：转到我收藏的第一个项目PriceList。那东西是一个集合；得到它的第二个项目。那东西是一个集合；得到它的第三...
Instead, you want slicing:
相反，你想要切片：
PriceList[:7] = [PizzaChange]*7
回答by inspectorG4dget
PizzaChange=float(input("What would you like the new price for all standard pizzas to be? "))
for i,price in enumerate(PriceList):
PriceList[i] = PizzaChange + 3*int(i>=7)
回答by Pi Marillion
It looks like you are trying to set elements 0 through 11 of PriceList to new values. The syntax would usually look like this:
看起来您正在尝试将 PriceList 的元素 0 到 11 设置为新值。语法通常如下所示：
prompt = "What would you like the new price for all standard pizzas to be? "
PizzaChange = float(input(prompt))
for i in [0, 1, 2, 3, 4, 5, 6]: PriceList[i] = PizzaChange
for i in [7, 8, 9, 10, 11]: PriceList[i] = PizzaChange + 3
If they are always consecutive ranges, then it's even simpler to write:
如果它们总是连续的范围，那么写起来就更简单了：
prompt = "What would you like the new price for all standard pizzas to be? "
PizzaChange = float(input(prompt))
for i in range(0, 7): PriceList[i] = PizzaChange
for i in range(7, 12): PriceList[i] = PizzaChange + 3
For reference, PriceList[0][1][2][3][4][5][6]refers to "Element 6 of element 5 of element 4 of element 3 of element 2 of element 1 of element 0 of PriceList. Put another way, it's the same as ((((((PriceList[0])[1])[2])[3])[4])[5])[6].
作为参考，PriceList[0][1][2][3][4][5][6]参考“元素0的元素1的元素2的元素3的元素3的元素5的元素6的元素PriceList。换句话说，它与((((((PriceList[0])[1])[2])[3])[4])[5])[6]。
