code: def left():
      left_key = [1, 3, 2, 1, 1, 2, 5, 1, 4, 5, 8, 12, 12312, 1] * 100
      left_val = list(range(len(left_key)))
      return cudf.DataFrame({"key": left_key, "val": left_val})
  
file_path: cudf/python/cudf/cudf/tests/test_join_order.py
imports: import itertools
  import operator
  import string
  from collections import defaultdict
  import numpy
  import pytest
  import cudf
  from cudf.core._compat import PANDAS_GE_220
  from cudf.testing._utils import assert_eq
label_desc: Use image node_id 2 for calling a global function with example usage: left() and returns: cudf