def test4():
    assert_equal(len(element_names), len(element_symbols))
    assert_equal(list(atomic_masses.keys()), list(atomic_numbers.keys()))
def test4():
    assert_equal(len(element_names), len(element_symbols))
    assert_equal(list(atomic_masses.keys()), list(atomic_numbers.keys()))
def test2():
    print(atomic_masses)
    print(atomic_mass_symbol_map)
    print(list(atomic_masses.keys()))
    assert_equal(element_symbols, list(atomic_masses.keys()))
def test2():
    print(atomic_masses)
    print(atomic_mass_symbol_map)
    print(list(atomic_masses.keys()))
    assert_equal(element_symbols, list(atomic_masses.keys()))