a method of combining vertical numbers into a single list

with open('in.txt', 'r') as f:
    data = [ ]
    line=f.readline()# Read line 1
    while line:
        Exclude data.append(line.rstrip())#line because it also contains newline characters
                                    # (Note that this excludes blank characters.)
        line=f.readline()# Read the next line

import sys

data = [n.trip() for n in sys.stdin.readlines()]
print(data)