code: def midx(pidx):
      num_elements = int(1e3)
      a = np.random.randint(0, num_elements // 10, num_elements)
      b = np.random.randint(0, num_elements // 10, num_elements)
      df = cudf.DataFrame({"a": a, "b": b})
      return cudf.MultiIndex.from_frame(df)
  
file_path: cudf/python/cudf/benchmarks/API/bench_multiindex.py
imports: import numpy
  import pandas
  import pytest
  from config import cudf
label_desc: Use image node_id 2 for calling a global function with example usage: midx(pidx) and returns: cudf