Python - Parsing through multiple lines of data from STDIN to store in standard array

I have gone through the suggested similar questions, however appear to run into dead-ends; likely because perhaps I am not adequately explaining my problem. I am attempting to take some STDIN I have access to, which looks like so:

What I am having trouble with is taking the integers after the first line and storing them all into a standard Python array.

[80, 90, 29, 20]

The very first input on the first line will always be some integer 0 or 1, representing the disabling/enabling of some "special feature", any other integers are then input which must be stored to a standard array. As you can see, some integers have lines all to themselves while other lines may have several integers (blank lines should be completely ignored). I have been attempting to solve this using sys.stdin, since I know after stripping things it already makes the input into list objects, however to little avail. My code so far is as follows:

parse = True
arry = []
print('Special Feature?  (Give 0 to disable feature.)')
feature = input()
print('Please give the input data:')
while parse:
    line = sys.stdin.readline().rstrip('\n')
    if line == 'quit':
        parse = False
    else:
        arry.append(line)
print('INPUT DATA:', arry)

The 'quit' is my attempt at a backdoor I can type by hand since I also don't know how to check for EOF. I know this is very bare-bones (hardly much of anything), but what I effectively wish to produce as my output is this:

Special Feature?  (Give 0 to disable feature.)
> 0
Please give the input data:
> 80 90 29 20
INPUT DATA: [80, 90, 29, 20]

The lines marked with ">" are not printed, I'm simply demonstrating how the input is conceptually supposed to be read. Of course, any and all help is appreciated, I look forward to your thoughts!

Solution

You can iterate over sys.stdin (read more here).

For storing your numbers, just write any code that will extract them from the strings, and then append the numbers to a list.

Here is an example.

import sys
parse = True
arry = []
print('Special Feature?  (Give 0 to disable feature.)')
feature = input()
print('Please give the input data:')
for l in sys.stdin:
    arry += l.strip().split() 
print('INPUT DATA:', arry)

Create a new file, for example data:

0
1 2 3
4 5 6

Now try to run the program

$ python3 f.py < data
Special Feature?  (Give 0 to disable feature.)
Please give the input data:
INPUT DATA: ['1', '2', '3', '4', '5', '6']

Each of the numbers is read from the file.