code: def test_get_loc_mismatched_freq(self):
      # see also test_get_indexer_mismatched_dtype testing we get analogous
      # behavior for get_loc
      dti = date_range("2016-01-01", periods=3)
      pi = dti.to_period("D")
      pi2 = dti.to_period("W")
      pi3 = pi.view(pi2.dtype)  # i.e. matching i8 representations
  
      with pytest.raises(KeyError, match="W-SUN"):
          pi.get_loc(pi2[0])
  
      with pytest.raises(KeyError, match="W-SUN"):
          # even though we have matching i8 values
          pi.get_loc(pi3[0])
  
imports: from datetime import datetime
  import re
  import numpy
  import pytest
  from pandas._libs.tslibs import period
  from pandas.errors import InvalidIndexError
  import pandas
  from pandas import DatetimeIndex, NaT, Period, PeriodIndex, Series, Timedelta, date_range, notna, period_range
  import pandas._testing
label_desc: Use image node_id 6 for calling the TestGetLoc obj's underlying member method code with example usage: obj.test_get_loc_mismatched_freq() without return types