code: def _rewind(self):
          '''rewind to start of log'''
          DFReader._rewind(self)
          self.line = 0
          # find the first valid line
          while self.line < len(self.lines):
              if self.lines[self.line].startswith("FMT, "):
                  break
              self.line += f _rewind(self):
          '''rewind to start of log'''
          DFReader._rewind(self)
          self.line = 0
          # find the first valid line
          while self.line < len(self.lines):
              if self.lines[self.line].startswith("FMT, "):
                  break
              self.line += 1
docs: rewind to start of log