code: def test_capitalize_mixed_object():
      s = Series(
          [
              "FOO",
              np.nan,
              "bar",
              True,
              datetime.today(),
              "blah",
              None,
              1,
              2.0,
          ]
      )
      result = s.str.capitalize()
      expected = Series(
          [
              "Foo",
              np.nan,
              "Bar",
              np.nan,
              np.nan,
              "Blah",
              None,
              np.nan,
              np.nan,
          ],
          dtype=object,
      )
      tm.assert_series_equal(result, expected)
  
imports: from datetime import datetime
  import operator
  import numpy
  import pytest
  from pandas import Series, _testing
label_desc: Use image node_id 6 for calling a global function with example usage: test_capitalize_mixed_object() without return types