filename=input("Enter the filename: ")
file=open(filename,'r')
line=file.readline()
outlist = []
# While we haven't got an empty line meaning the end of the file
while(len(line)!=0):
    # Split the line into tokens
    split_line = line.split()
    # Get a new line from the file
    line=file.readline()
    # Loop over all of the tokens in the split_line and convert them to ints, then append to our int_line
    int_line = []
    for element in split_line:
        int_line.append(int(element))
    outlist.append(int_line)
print(outlist)
file.close()