code: def _list_lstrip(self, L, val=0):
          '''Left strip the specified value'''
          for i in _range(len(L)):
              if L[i] != val:
                  return L[i:f _list_lstrip(self, L, val=0):
          '''Left strip the specified value'''
          for i in _range(len(L)):
              if L[i] != val:
                  return L[i:]
docs: Left strip the specified value