Question

我正在尝试在2D列表的特定位置附加一个带有另一个数字的数字。

# Create UAS database list that was displayed in the file
uas_Stock = [["CS116",1],["CS117",1],["CS118",1],["CS119",1],["CS120",1]]

# Ask user to select which UAV they want to check out.
uas_out = input("Which UAV would you like to checkout? ")

# Append stock list to show UAS is checked out
if uas_out == "CS116":
    uas_Stock.insert(0, [0])
elif uas_out == "CS117":
    uas_Stock.insert(1, [0])
elif uas_out == "CS118":
    uas_Stock.insert(2, [0])
elif uas_out == "CS119":
    uas_Stock.insert(3, [0])
elif uas_out == "CS120":
    uas_Stock.insert(4, [0])
else:
    print("That input is not a valid UAS ID in our system.")

假设我选择CS117，它将通过if / else语句运行到CS117。然后它会在uas_Stock列表中的1处插入一个0。

而是将0插入列表的CS117部分而不是1部分。我已经尝试了其他方法来做到这一点，但得到像“int”对象不可订阅等错误。

Answer 1

我认为这样做你想要的，虽然不清楚，因为你没有发布预期的结果......

uas_Stock = [["CS116",1],["CS117",1],["CS118",1],["CS119",1],["CS120",1]]

# Ask user to select which UAV they want to check out.
uas_out = input("Which UAV would you like to checkout? ")

# Append stock list to show UAS is checked out
found = False
for stock_list in uas_Stock:
    if stock_list[0] == uas_out:
        stock_list[1] = 0
        found = True
        break
if not found:
    print("That input is not a valid UAS ID in our system.")

搜索列表并在找到UAS时将数字更改为0.

示例运行：

Which UAV would you like to checkout? CS117
>>> print(uas_Stock)
[['CS116', 1], ['CS117', 0], ['CS118', 1], ['CS119', 1], ['CS120', 1]]

您将新列表插入外部列表，而（我认为）您真正想要做的是替换值内部列表。

将特定数字附加到2D列表中的特定位置

1 个答案: