code: def main():
      get_mixed_pattern(unit_length=24, num_duplicates=2000)
      group_traffic_cv(
          num_ts=800,
          num_groups=49,
          context_length=72,
          prediction_length=24,
          file_name="traffic",
      )
      group_exchangerate_cv(
          num_ts=8,
          num_groups=32,
          context_length=8,
          prediction_length=1,
          file_name="exchange_rate",
      )
      group_electricity_cv(
          num_ts=300,
          num_groups=70,
          context_length=72,
          prediction_length=24,
          file_name="electricity",
      )
      print(
          "Finished the preprocessing data, please verify ./dataset/ contains four"
          " .csv files"
      )
  
file_path: gluonts/src/gluonts/nursery/SCott/preprocess_data.py
imports: from pts.dataset.repository.datasets import get_dataset, dataset_recipes
  from pts.dataset.utils import to_pandas
  import os
  import numpy
  import pandas
  from pts.dataset import ListDataset
  import torch
  import pickle
  import json
  import random
  import os
label_desc: Use image node_id 6 for calling a global function with example usage: main() without return types