code: def test_maybe_convert_timedelta():
      pi = PeriodIndex(["2000", "2001"], freq="D")
      offset = offsets.Day(2)
      assert pi._maybe_convert_timedelta(offset) == 2
      assert pi._maybe_convert_timedelta(2) == 2
  
      offset = offsets.BusinessDay()
      msg = r"Input has different freq=B from PeriodIndex\(freq=D\)"
      with pytest.raises(ValueError, match=msg):
          pi._maybe_convert_timedelta(offset)
  
file_path: pandas/pandas/tests/indexes/period/test_period.py
imports: import numpy
  import pytest
  from pandas import Index, NaT, Period, PeriodIndex, Series, date_range, offsets, period_range
  import pandas._testing
label_desc: Use image node_id 1 for calling a global function with example usage: test_maybe_convert_timedelta() without return types