code: def load(self, url, offset=0, length=-1):
          
  
          # if starting with . or /, can only be a file path..
          file_only = url.startswith(('/', '.'))
  
          # convert to filename
          filename = from_file_url(url)
          if filename != url:
              file_only = True
              url = filename
  
          try:
              # first, try as file
              afile = open(url, 'rb')
  
          except IOError:
              if file_only:
                  raise
  
              return super(LocalFileLoader, self).load(url, offset, length)
  
          if offset > 0:
              afile.seek(offset)
  
          if length >= 0:
              return LimitReader(afile, length)
          else:
              return afile
docs: Load a file-like reader from the local file system