def get_installed_pypackages():
    return {p.project_name.lower(): p for p in pkg_resources.working_set}
def test_ccode_constants_mathh():
    assert ccode(exp(1)) == "M_E"
    assert ccode(pi) == "M_PI"
    assert ccode(oo) == "HUGE_VAL"
    assert ccode(-oo) == "-HUGE_VAL"