code: def cluster_number(self, data, maxgap): 
          '''General function that clusters numbers.
  
          Args
              data (list): list of integers.
              maxgap (int): max gap between numbers in the cluster.
  
          '''
  
          data.sort()
          groups = [[data[0]]]
          for x in data[1:]:
              if abs(x - groups[-1][-1]) <= maxgap:
                  groups[-1].append(x)
              else:
                  groups.append([x])
          return groupf cluster_number(self, data, maxgap): 
          '''General function that clusters numbers.
  
          Args
              data (list): list of integers.
              maxgap (int): max gap between numbers in the cluster.
  
          '''
  
          data.sort()
          groups = [[data[0]]]
          for x in data[1:]:
              if abs(x - groups[-1][-1]) <= maxgap:
                  groups[-1].append(x)
              else:
                  groups.append([x])
          return groups
docs: General function that clusters numbers.
  
          Args
              data (list): list of integers.
              maxgap (int): max gap between numbers in the cluster.