Python 在列表列表中搜索字符
我有一个列表列表,我想返回那些具有特定字符的子列表 如果列表为:Python 在列表列表中搜索字符,python,list,Python,List,我有一个列表列表,我想返回那些具有特定字符的子列表 如果列表为: lst = [['a', 'e'], ['g', 'j'], ['m', 'n', 'w'], ['z']] 我想检索['g',j']“或它的位置”如果我使用j或g进行搜索,首先变量中有一个关键字错误-列表是一个关键字,请尝试我的列表 这可用于返回所需的列表: #Try this my_list = [['a', 'e'], ['g', 'j'], ['m', 'n', 'w'], ['z']] def check_for_le
lst = [['a', 'e'], ['g', 'j'], ['m', 'n', 'w'], ['z']]
我想检索
['g',j']
“或它的位置”如果我使用j
或g
进行搜索,首先变量中有一个关键字错误-列表是一个关键字,请尝试我的列表
这可用于返回所需的列表:
#Try this
my_list = [['a', 'e'], ['g', 'j'], ['m', 'n', 'w'], ['z']]
def check_for_letter(a_list,search):
for i in a_list[:]:
if search in a_list[0]:
return a_list[0]
else:
a_list[0] = a_list[1]
以下会议:
>>> check_for_letter(my_list,"j")
['g', 'j']
>>>
这是一种方式。它甚至适用于重复
lst = [['a', 'e'], ['g', 'j'], ['m', 'n', 'w'], ['z']]
def searcher(lst, x):
for i in range(len(lst)):
if x in lst[i]:
yield i
list(searcher(lst, 'g')) # [1]
list(map(lst.__getitem__, searcher(lst, 'g'))) # [['g', 'j']]
试试这个:-
lst = [['a', 'e'], ['g', 'j'], ['m', 'n', 'w'], ['z']]
def search(search_char):
result = [x for x in lst if search_char in x]
return result
print(search('g'))
lst=['a','e'],['g','j'],['m','n','w'],['z']]
def搜索(规格字符):
对于lst中的子列表:
如果子列表中的spec_char:
返回子列表
返回错误
打印搜索('g')
>>>['g','j']
这里我将“f”作为要搜索的字符或者,我们也可以使用lambda和filter函数 在python文档中可以找到lambda和filter函数的基础知识
lst = [['a', 'e'], ['g', 'j'], ['m', 'n', 'w'], ['z']]
ch = input('Enter the character') # or directly type the character in ''
# lambda <parameter to the function>: <value to be returned>
# filter(<lambda function to check for the condition>, <sequence to iterate over>)
r = list(filter(lambda lst: ch in lst,lst))
print(r)
lst=['a','e'],['g','j'],['m','n','w'],['z']]
ch=输入(“输入字符”)#或直接在“”中键入字符
#拉姆达:
#过滤器(,)
r=列表(过滤器(λlst:ch in lst,lst))
印刷品(r)
注意:为了查看lambda和filter函数返回的值,我将结果存储在一个列表中并打印最终输出。下面是您问题的解决方案和解释。请查看此答案底部的图像以进一步澄清并查看输出
lst = [['a', 'e'], ['g', 'j'], ['m', 'n', 'w'], ['z']] #So this is your list
character=input("Enter the character: ") #The character you are searching for
for a in lst: #it means that variable [a] is an item in the list [lst]
for b in a: #it means that variable [b] is an item in the list [a]
if(b==character): #To check if the given character is present in the list
print(a) #Finally to print the list in which the given character is present
代码部分结束了。现在,让我们看看输出将是什么
C:\Users\User\Desktop\python>coc.py
Enter the character: a
['a', 'e']
C:\Users\User\Desktop\python>coc.py
Enter the character: w
['m', 'n', 'w']
如果您还想知道列表的位置,请发表评论。我已经设法手动完成了这项工作,但我认为有一种有效的方法可以做到这一点。另外,我刚才用这个列表来澄清我的问题,谢谢!这回答了你的问题吗?
lst = [['a', 'e'], ['g', 'j'], ['m', 'n', 'w'], ['z']] #So this is your list
character=input("Enter the character: ") #The character you are searching for
for a in lst: #it means that variable [a] is an item in the list [lst]
for b in a: #it means that variable [b] is an item in the list [a]
if(b==character): #To check if the given character is present in the list
print(a) #Finally to print the list in which the given character is present
C:\Users\User\Desktop\python>coc.py
Enter the character: a
['a', 'e']
C:\Users\User\Desktop\python>coc.py
Enter the character: w
['m', 'n', 'w']