class_docstr: Generates index for past covariates on train and inference datasets
class_docstr_tok: ["Generates","index","for","past","covariates","on","train","and","inference","datasets"]
code: def base_component_name(self) -> str:
      return "pc"
  
imports: from abc import ABC, abstractmethod
  from typing import List, Optional, Sequence, Tuple, Union
  import numpy
  import pandas
  from darts import TimeSeries
  from darts.dataprocessing.transformers import FittableDataTransformer
  from darts.logging import get_logger, raise_if, raise_log
  from darts.utils.timeseries_generation import generate_index
label_desc: Use image node_id 3 for calling the PastCovariatesIndexGenerator obj's underlying member method code with example usage: obj.base_component_name() and returns: str