How do I make a selection from a text file based on what text is inside it (Python)

Question

I am having trouble with my file. I've split it so each line is a separate list eg.

myList = [['Adam','16','Yes'], ['Fred','22','No']]

and trying to make a variable that only select lines with contain a "Yes".

How would I go about doing this?

Answer 1

因此，您只想选择第三个成员等于"Yes" ：

selected = [data for data in your_list if data[2] == "Yes"]

Answer 2

myList = your_input_sequence

lambda function to select only matching text: lambda x: x[<position_of_string_to_compare>].lower()

Desired function:

result = filter(lambda x: x[2].lower() == 'yes', myList)

>>> myList
[['Adam', '16', 'Yes'], ['Fred', '22', 'No']]
>>> res = filter(lambda x: x[2].lower()=='yes', myList)
>>> res
[['Adam', '16', 'Yes']]

Answer 3

You can do this:

myList = [['Adam','16','Yes'], ['Fred','22','No']]
x='Yes'
list1=[]
for i in myList:
    for j in i:       
        if x==j:
            list1.append(i)
for x in list1:
    a=" ".join(x)
f= open("textDocument.txt","w+")
f.write(a)
c=f.read()
f.close()