code: def left_subtract(l1, l2):
      lst = []
      for i in l1:
          if i not in l2:
              lst.append(i)
      return lst
  
imports: from typing import List
  import numpy
  import pandas
  import copy
  import pdb
  from sklearn.model_selection import TimeSeriesSplit
  import dask
  import dask.dataframe
  import datetime
  from datetime import datetime, date, time
label_desc: Use image node_id 7 for calling a global function with example usage: left_subtract(l1, l2) and returns: lst