code: def _proc_inf_empty_strings(col):
      """Handles empty and infinity strings"""
      col = libstrings.to_lower(col)
      col = _proc_empty_strings(col)
      col = _proc_inf_strings(col)
      return col
  
file_path: cudf/python/cudf/cudf/core/tools/numeric.py
imports: import warnings
  import numpy
  import pandas
  import cudf
  from cudf import _lib
  from cudf._lib import strings
  from cudf.api.types import _is_non_decimal_numeric_dtype, is_datetime_dtype, is_string_dtype, is_timedelta_dtype
  from cudf.core.column import as_column
  from cudf.core.dtypes import CategoricalDtype
  from cudf.utils.dtypes import can_convert_to_column
label_desc: Use image node_id 3 for calling a global function with example usage: _proc_inf_empty_strings(col) and returns: col