code: def by_row(request):
      return request.param
  
imports: import numpy
  import pytest
  import pandas
  from pandas import DataFrame, Index, MultiIndex, Series, concat, date_range, timedelta_range
  import pandas._testing
  from pandas.tests.apply.common import series_transform_kernels
label_desc: Use image node_id 1 for calling a global function with example usage: by_row(request) and returns: request