如何在列表的子列表中查找项目的索引 (python)

Question

ExampleList = [['Ck'], ['Kat'], ['Arcadiusz']]

ExampleListFull = [['CK', 21, 'Male'], ['Kat', 19, 'Female'], ['Arcadiusz', 30, 'Male']]
           

User = str(input())
User = User.capitalise()

if ([User] in ExampleList) == True:

从这里我们想找到“用户”的索引，让我们用Kat，我知道它是1、0，
但是我希望程序能够告诉我名字是什么 输入，这样我就可以打印
(User + '\'s', 'age is', (ExampleListFull(variable) (variable)))

Answer 1

我建议您在这里使用字典作为数据结构，但如果您需要一个列表，您可以尝试使用如下索引方法：

ExampleList = [['Ck'], ['Kat'], ['Arcadiusz']]

x = ExampleList.index(['Ck'])

print(x)

输出：

0

这个returns指定值第一次出现的位置

Answer 2

ExampleList = [['Ck'], ['Kat'], ['Arcadiusz']]

ExampleListFull = [['CK', 21, 'Male'], ['Kat', 19, 'Female'], ['Arcadiusz', 30, 'Male']]

User = str(input()) 
User = User.capitalize()
for Index,string in enumerate(ExampleList):
  
  if User == ExampleList[Index][0]:

    print(User + 's', 'age is ' + str(ExampleListFull[Index][1])) 

Answer 3

ExampleListFull = [['CK', 21, 'Male'], ['Kat', 19, 'Female'], ['Arcadiusz', 30, 'Male']]
User = str(input())
User = User.capitalise()

在这里，我们创建了一个包含所有名称值的虚拟列表。这应该打印 ['CK', 'Kat', 'Arcadiusz']

names = [value[0] for value in data]
print(names)

一行for循环相当于做：

names = []
for value in data:
    names.append(value[0])

然后我们可以打印结果

print(names.index(name))
print("Age is", {data[names.index(name)][1]})

这一切都可以缩短为几行代码，如下所示：

data = [['CK', 21, 'Male'], ['Kat', 19, 'Female'], ['Arcadiusz', 30, 'Male']]

User = str(input())
User = User.capitalise()

age = data[[value[0] for value in data].index(name)][1]
# gender= data[[value[0] for value in data].index(name)][2]