read from one file and write to another file line by line until end of file

def read_write(read_file, write_file):
  with open(read_file, 'r') as rf:
    with open(write_file, 'w') as wf:
      line = rf.readline()
      while line:
          print(line, end='')
          wf.write(line)
          line = rf.readline()