openfile = open('name.txt')
for line in openfile.readlines():
    myfile = open(line + ".txt", mode='w')
    myfile.write("text " + line.strip() 'n')
    myfile.close()

OSError: [Errno 22] Invalid argument: 'TEST00000n.txt'

openfile = open('name.txt')
for line in openfile.readlines():
    myfile = open(line.rstrip() + ".txt", mode='w')
    myfile.write("text " + line.strip()+'n')
    myfile.close()