code: def _select_columns(columns, remove_columns):
      for item in remove_columns:
          columns.remove(item)
  
      return ",".join(columns)
  
imports: from blazingsql import BlazingContext
  import os
  import math
  import filecmp
  import shutil
  from itertools import combinations
  import pandas
  import dask_cudf
label_desc: Use image node_id 3 for calling a global function with example usage: _select_columns(columns, remove_columns) and returns: str