code: def get_symbols_list(self):
          '''Return a list of GdxSymb found in the GdxFile.'''
          slist = []
          rc, nSymb, nElem = gdxcc.gdxSystemInfo(self.gdx_handle)
          assert rc, 'Unable to retrieve "%s" info' % self.filename
          self.number_symbols = nSymb
          self.number_elements = nElem
          slist = [None]*(nSymb+1)
          for j in range(0,nSymb+1):
              sinfo = self.get_sid_info(j)
              if j==0:
                  sinfo['name'] = 'universal_set'
              slist[j] = GdxSymb(self,sinfo)
          return slisf get_symbols_list(self):
          '''Return a list of GdxSymb found in the GdxFile.'''
          slist = []
          rc, nSymb, nElem = gdxcc.gdxSystemInfo(self.gdx_handle)
          assert rc, 'Unable to retrieve "%s" info' % self.filename
          self.number_symbols = nSymb
          self.number_elements = nElem
          slist = [None]*(nSymb+1)
          for j in range(0,nSymb+1):
              sinfo = self.get_sid_info(j)
              if j==0:
                  sinfo['name'] = 'universal_set'
              slist[j] = GdxSymb(self,sinfo)
          return slist
docs: Return a list of GdxSymb found in the GdxFile.