class_docstr: Dynamic Instruments Filter Abstract class
  
  Users can override this class to construct their own filter
  
  Override __init__ to input filter regulations
  
  Override filter_main to use the regulations to filter instruments
class_docstr_tok: ["Dynamic","Instruments","Filter","Abstract","class","Users","can","override","this","class","to","construct","their","own","filter","Override","__init__","to","input","filter","regulations","Override","filter_main","to","use","the","regulations","to","filter","instruments"]
code: def __init__(self):
      pass
  
imports: from __future__ import print_function
  from abc import abstractmethod
  import re
  import pandas
  import numpy
  import abc
  from .data import Cal, DatasetD
label_desc: Use image node_id 1 to create a new BaseDFilter object from inherited base classes: abc with example: obj = BaseDFilter()