text: """
  MIT License
  
  Copyright (c) 2017 cgalleguillosm
  
  Permission is hereby granted, free of charge, to any person obtaining a copy
  of this software and associated documentation files (the "Software"), to deal
  in the Software without restriction, including without limitation the rights
  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  copies of the Software, and to permit persons to whom the Software is
  furnished to do so, subject to the following conditions:
  
  The above copyright notice and this permission notice shall be included in all
  copies or substantial portions of the Software.
  
  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  SOFTWARE.
  """
  from os import makedirs as _makedir, listdir as _listdir
  from os.path import isfile as _isfile, isdir as _isdir, join as _join
  from ntpath import split as _split, basename as _basename
  from shutil import rmtree as _rmtree
  from json import dump as _dump, load as _load
  
  
  def file_exists(file_path, boolean=False, raise_error=False, head_message=''):
      """
  
      :param file_path:
      :param boolean:
      :param raise_error:
      :param head_message:
      :return:
      """
      exists = _isfile(file_path)
      if (raise_error or head_message != '') and not exists:
          raise Exception('{}{} File does not exist.'.format(head_message, file_path))
      if boolean:
          return exists
      return file_path
  
  
  def dir_exists(dir_path, create=False):
      """
  
      :param dir_path:
      :param create:
      :return:
      """
      exists = _isdir(dir_path)
      if create and not exists:
          _makedir(dir_path)
          return True
      return exists
  
  
  def path_leaf(path):
      """
  
      :param path:
      :return:
      """
      """
  
      Extract path and filename
  
      :param path: Entire filepath
  
      :return: Return a tuple that contains the (path, filename)
  
      """
      head, tail = _split(path)
      return (head, tail or _basename(head))
  
  
  def remove_dir(path, parent_folder='results/'):
      """
  
      :param path:
      :param parent_folder:
      :return:
      """
      if path.startswith(parent_folder) and dir_exists(path):
          _rmtree(path)
  
  
  def find_file_by(_path, prefix=None, sufix=None):
      """
  
      :param _path:
      :param prefix:
      :param sufix:
      :return:
      """
      filename = None
      for _filename in _listdir(_path):
          _filepath = _join(_path, _filename)
          if _isfile(_filepath) and (_filename.startswith(prefix) if prefix else _filename.endswith(sufix)):
              if not filename:
                  filename = _filename
              else:
                  raise Exception('Multiple benchmark files in a same folder.')
      return filename
  
  
  def save_jsonfile(filepath, _dict, **kwargs):
      """
  
      :param filepath:
      :param _dict:
      :param kwargs:
      :return:
      """
      """
      
      Saves a json file.
      
      :param config_fp: Filepath to the config
      :param \*\*kwargs: Source for the config data  
      
      """
      with open(filepath, 'w') as file:
          _dump(_dict, file, **kwargs)
  
  
  def load_jsonfile(filepath):
      """
  
      :param filepath:
      :return:
      """
      """
      
      Loads an specific json file
      
      :param filepath: Filepath of a json file.
      
      :return: A dictionary 
      
      """
      with open(filepath) as file:
          return _load(file)
  
  class PlainFileReader:
      
      def __init__(self, filepath):
          """
  
          :param filepath:
          """
          assert(file_exists(filepath, True, True))
          self.file = open(filepath)
          self.last_pos = self.file.tell()
          self.EOF = False
          
      def nextline(self):
          """
  
          :return:
          """
          line = self.file.readline()
          last_pos = self.file.tell()
          if self.last_pos == last_pos:
              self.EOF = True
              return None
          self.last_pos = last_pos
          return line