code: def make_epub_base(location):
      
      log.info('Making EPUB base files in {0}'.format(location))
      with open(os.path.join(location, 'mimetype'), 'w') as out:  # mimetype file
          out.write('application/epub+zip')
  
      #Create EPUB and META-INF directorys
      os.mkdir(os.path.join(location, 'META-INF'))
      os.mkdir(os.path.join(location, 'EPUB'))
      os.mkdir(os.path.join(location, 'EPUB', 'css'))
  
      with open(os.path.join(location, 'META-INF', 'container.xml'), 'w') as out:
          out.write('''\
  <?xml version="1.0" encoding="UTF-8"?>
  <container version="1.0" xmlns="urn:oasis:names:tc:opendocument:xmlns:container">
     <rootfiles>
        <rootfile full-path="EPUB/package.opf" media-type="application/oebps-package+xml"/>
     </rootfiles>
  </container>''')
  
      with open(os.path.join(location, 'EPUB', 'css', 'default.css') ,'wb') as out:
          out.write(bytes(DEFAULT_CSS, 'UTF-8'))
docs: Creates the base structure for an EPUB file in a specified location.
  
      This function creates constant components for the structure of the EPUB in
      a specified directory location.
  
      Parameters
      ----------
      location : str
          A path string to a local directory in which the EPUB is to be built