text: # Licensed to Modin Development Team under one or more contributor license agreements.
  # See the NOTICE file distributed with this work for additional information regarding
  # copyright ownership.  The Modin Development Team licenses this file to you under the
  # Apache License, Version 2.0 (the "License"); you may not use this file except in
  # compliance with the License.  You may obtain a copy of the License at
  #
  #     http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software distributed under
  # the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF
  # ANY KIND, either express or implied. See the License for the specific language
  # governing permissions and limitations under the License.
  
  import os
  from os.path import dirname, abspath
  
  
  # This is the python file root directory (modin/modin)
  rootdir = dirname(abspath(__file__))
  exclude_files = ["_version.py"]
  
  with open("{}{}".format(dirname(rootdir), "/LICENSE_HEADER"), "r") as f:
      # Lines to check each line individually
      header_lines = f.readlines()
  
  for subdir, dirs, files in os.walk(rootdir):
      for file in files:
          filepath = os.path.join(subdir, file)
          if file.endswith(".py") and file not in exclude_files:
              with open(filepath, "r+") as f:
                  # Lines for line by line comparison
                  py_file_lines = f.readlines()
                  if len(py_file_lines):
                      first_non_comment_idx = next(
                          i
                          for i in range(len(py_file_lines))
                          if not py_file_lines[i].startswith("# ")
                      )
                      py_file_lines = py_file_lines[first_non_comment_idx:]
                  new_contents = "".join(header_lines + py_file_lines)
                  f.seek(0)
                  f.write(new_contents)
                  f.truncate()
  