class_docstr: Test the methods of the annihilation operator FermiA
docstr: Test __init__ function returns the expected FermiWord object
docstr_tok: ["Test","__init__","function","returns","the","expected","FermiWord","object"]
code: def test_initialization(self, orbital):
      """Test __init__ function returns the expected FermiWord object"""
      op = FermiA(orbital)
      op_dict = {(0, orbital): "-"}
  
      assert isinstance(op, FermiWord)
      assert len(op) == 1
      assert list(op.keys()) == [(0, orbital)]
      assert list(op.values()) == ["-"]
  
      assert dict(op) == op_dict
  
imports: import pytest
  from pennylane.fermi.fermionic import FermiWord, FermiC, FermiA
label_desc: Use image node_id 1 for calling the TestFermiA obj's underlying member method code with example usage: obj.test_initialization(orbital) without return types