code: def test_dagger():
      i, j, n, m = symbols("i,j,n,m")
      assert Dagger(1) == 1
      assert Dagger(1.0) == 1.0
      assert Dagger(2 * I) == -2 * I
      assert Dagger(S.Half * I / 3.0) == I * Rational(-1, 2) / 3.0
      assert Dagger(BKet([n])) == BBra([n])
      assert Dagger(B(0)) == Bd(0)
      assert Dagger(Bd(0)) == B(0)
      assert Dagger(B(n)) == Bd(n)
      assert Dagger(Bd(n)) == B(n)
      assert Dagger(B(0) + B(1)) == Bd(0) + Bd(1)
      assert Dagger(n * m) == Dagger(n) * Dagger(m)  # n, m commute
      assert Dagger(B(n) * B(m)) == Bd(m) * Bd(n)
      assert Dagger(B(n) ** 10) == Dagger(B(n)) ** 10
      assert Dagger("a") == Dagger(Symbol("a"))
      assert Dagger(Dagger("a")) == Symbol("a")
  
imports: from sympy.physics.secondquant import Dagger, Bd, VarBosonicBasis, BBra, B, BKet, FixedBosonicBasis, matrix_rep, apply_operators, InnerProduct, Commutator, KroneckerDelta, AnnihilateBoson, CreateBoson, BosonicOperator, F, Fd, FKet, BosonState, CreateFermion, AnnihilateFermion, evaluate_deltas, AntiSymmetricTensor, contraction, NO, wicks, PermutationOperator, simplify_index_permutations, _sort_anticommuting_fermions, _get_ordered_dummies, substitute_dummies, FockStateBosonKet, ContractionAppliesOnlyToFermions
  from sympy.concrete.summations import Sum
  from sympy.core.function import Function, expand
  from sympy.core.numbers import I, Rational
  from sympy.core.singleton import S
  from sympy.core.symbol import Dummy, Symbol, symbols
  from sympy.functions.elementary.miscellaneous import sqrt
  from sympy.printing.repr import srepr
  from sympy.simplify.simplify import simplify
  from sympy.testing.pytest import slow, raises
  from sympy.printing.latex import latex
label_desc: Use image node_id 3 for calling a global function with example usage: test_dagger() without return types