code: def setHeader(package_path,
                header_start='', header_end='', header_text='',
                remove_header=False,
                exclude_init=True, exclude_empty_files=True):
      
  
      pkg_name = os.path.split(package_path)[-1]
  
      if not os.path.exists(package_path):
          Exception("ERROR: given path '%s' not valid" % package_path)
  
      py_files = _findPyFiles(package_path, exclude_init)
      print('found %s py files in package %s' % (len(py_files), pkg_name))
      for path in py_files:
          print(path)
          _setHeaderInPyFile(path, header_start, header_text,
                             header_end, remove_header, exclude_empty_files)
      print('done.')
docs: Adds, modifies removes a header text in all *.py files in a python package
  
      header_start -> string indicating the begin of the header e.g. '#<<<<<<<<<'
      header_text -> the header text e.g. '#copyright John Doe 2033\n#licensed under GPLv3'
      header_end -> string indicating the end of the header e.g. '#>>>>>>>>>'
  
      package_path -> relative or absolute path of the package to modify e.g. 'C:\\...\\myPackage'
      remove_header -> Set to True to remove the header in every py file in the package