How to use the hy.models.HyComplex function in hy

def test_lex_expression_complex():
    """ Make sure expressions can produce complex """

    def t(x): return tokenize("(foo {})".format(x))

    def f(x): return [HyExpression([HySymbol("foo"), x])]

    assert t("2.j") == f(HyComplex(2.j))
    assert t("-0.5j") == f(HyComplex(-0.5j))
    assert t("1.e7j") == f(HyComplex(1e7j))
    assert t("j") == f(HySymbol("j"))
    assert isnan(t("NaNj")[0][1].imag)
    assert t("nanj") == f(HySymbol("nanj"))
    assert t("Inf+Infj") == f(HyComplex(complex(float("inf"), float("inf"))))
    assert t("Inf-Infj") == f(HyComplex(complex(float("inf"), float("-inf"))))
    assert t("Inf-INFj") == f(HySymbol("Inf-INFj"))

def test_lex_expression_complex():
    """ Make sure expressions can produce complex """

    def t(x): return tokenize("(foo {})".format(x))

    def f(x): return [HyExpression([HySymbol("foo"), x])]

    assert t("2.j") == f(HyComplex(2.j))
    assert t("-0.5j") == f(HyComplex(-0.5j))
    assert t("1.e7j") == f(HyComplex(1e7j))
    assert t("j") == f(HySymbol("j"))
    assert isnan(t("NaNj")[0][1].imag)
    assert t("nanj") == f(HySymbol("nanj"))
    assert t("Inf+Infj") == f(HyComplex(complex(float("inf"), float("inf"))))
    assert t("Inf-Infj") == f(HyComplex(complex(float("inf"), float("-inf"))))
    assert t("Inf-INFj") == f(HySymbol("Inf-INFj"))

def test_lex_expression_complex():
    """ Make sure expressions can produce complex """

    def t(x): return tokenize("(foo {})".format(x))

    def f(x): return [HyExpression([HySymbol("foo"), x])]

    assert t("2.j") == f(HyComplex(2.j))
    assert t("-0.5j") == f(HyComplex(-0.5j))
    assert t("1.e7j") == f(HyComplex(1e7j))
    assert t("j") == f(HySymbol("j"))
    assert isnan(t("NaNj")[0][1].imag)
    assert t("nanj") == f(HySymbol("nanj"))
    assert t("Inf+Infj") == f(HyComplex(complex(float("inf"), float("inf"))))
    assert t("Inf-Infj") == f(HyComplex(complex(float("inf"), float("-inf"))))
    assert t("Inf-INFj") == f(HySymbol("Inf-INFj"))

def test_complex():
    """Ensure we tokenize complex numbers properly"""
    # This is a regression test for #143
    entry = tokenize("(1j)")[0][0]
    assert entry == HyComplex("1.0j")
    entry = tokenize("(j)")[0][0]
    assert entry == HySymbol("j")

def test_number_model_copy():
    i = HyInteger(42)
    assert (i == copy.copy(i))
    assert (i == copy.deepcopy(i))

    f = HyFloat(42.)
    assert (f == copy.copy(f))
    assert (f == copy.deepcopy(f))

    c = HyComplex(42j)
    assert (c == copy.copy(c))
    assert (c == copy.deepcopy(c))

def test_lex_expression_complex():
    """ Make sure expressions can produce complex """

    def t(x): return tokenize("(foo {})".format(x))

    def f(x): return [HyExpression([HySymbol("foo"), x])]

    assert t("2.j") == f(HyComplex(2.j))
    assert t("-0.5j") == f(HyComplex(-0.5j))
    assert t("1.e7j") == f(HyComplex(1e7j))
    assert t("j") == f(HySymbol("j"))
    assert isnan(t("NaNj")[0][1].imag)
    assert t("nanj") == f(HySymbol("nanj"))
    assert t("Inf+Infj") == f(HyComplex(complex(float("inf"), float("inf"))))
    assert t("Inf-Infj") == f(HyComplex(complex(float("inf"), float("-inf"))))
    assert t("Inf-INFj") == f(HySymbol("Inf-INFj"))

if '/' in obj:
        try:
            lhs, rhs = obj.split('/')
            return HyExpression([HySymbol('fraction'), HyInteger(lhs),
                                 HyInteger(rhs)])
        except ValueError:
            pass

    try:
        return HyFloat(obj)
    except ValueError:
        pass

    if obj != 'j':
        try:
            return HyComplex(obj)
        except ValueError:
            pass

    if obj.startswith(":") and "." not in obj:
        return HyKeyword(obj[1:])

    @builds_model(HyInteger, HyFloat, HyComplex)
    def compile_numeric_literal(self, x):
        f = {HyInteger: int,
             HyFloat: float,
             HyComplex: complex}[type(x)]
        return asty.Num(x, n=f(x))

def compile_numeric_literal(self, x):
        f = {HyInteger: int,
             HyFloat: float,
             HyComplex: complex}[type(x)]
        return asty.Num(x, n=f(x))