How to use the rpmlint.lint.Lint function in rpmlint

def test_run_full_directory(capsys, packages):
    assert packages.is_dir()
    file_list = []
    for item in packages.iterdir():
        if item.is_file():
            file_list.append(item)
    number_of_pkgs = len(file_list)
    additional_options = {
        'rpmfile': [packages],
    }
    options = {**options_preset, **additional_options}
    linter = Lint(options)
    linter.run()
    out, err = capsys.readouterr()
    assert f'0 packages and {number_of_pkgs} specfiles checked' in out
    assert not err

def test_run_empty(capsys):
    linter = Lint(options_preset)
    linter.run()
    out, err = capsys.readouterr()
    assert err
    assert '0 packages and 0 specfiles checked; 0 errors, 0 warnings' in out

def test_run_rpmlintrc_single_file(capsys, packages):
    additional_options = {
        'rpmfile': [packages],
    }
    options = {**options_preset, **additional_options}
    linter = Lint(options)
    linter.run()
    out, err = capsys.readouterr()
    assert not err
    assert 'rpmlintrc:' in out

def test_run_installed_and_no_files(capsys):
    additional_options = {
        'rpmfile': [],
        'installed': ['python3-rpm'],
    }
    options = {**options_preset, **additional_options}
    linter = Lint(options)
    linter.checks = _remove_except_zip(linter.checks)
    linter.run()
    out, err = capsys.readouterr()
    assert '1 packages and 0 specfiles checked' in out
    assert not err

def test_configoutput(capsys):
    additional_options = {
        'print_config': True,
    }
    options = {**options_preset, **additional_options}
    linter = Lint(options)
    linter.run()
    out, err = capsys.readouterr()
    assert out
    assert 'Vendor = "Fedora Project"' in out
    assert not err

def test_run_installed_not_present(capsys):
    additional_options = {
        'rpmfile': [],
        'installed': ['non-existing-package'],
    }
    options = {**options_preset, **additional_options}
    linter = Lint(options)
    linter.checks = _remove_except_zip(linter.checks)
    linter.run()
    out, err = capsys.readouterr()
    assert '0 packages and 0 specfiles checked' in out
    assert 'there is no installed rpm' in err
    assert 'There are no files to process' in err

def test_header_information(capsys):
    additional_options = {
        'rpmfile': [],
        'installed': ['python3-rpm'],
    }
    options = {**options_preset, **additional_options}
    linter = Lint(options)
    linter.checks = _remove_except_zip(linter.checks)
    linter.run()
    out, err = capsys.readouterr()
    assert 'packages: 1' in out

def test_cases_loading():
    linter = Lint(options_preset)
    assert list(linter.checks.keys()) == basic_tests

def test_run_rpmlintrc_single_dir(capsys, packages):
    additional_options = {
        'rpmfile': [packages],
    }
    options = {**options_preset, **additional_options}
    linter = Lint(options)
    linter.run()
    out, err = capsys.readouterr()
    assert not err
    assert 'rpmlintrc:' in out

def lint():
    """
    Main wrapper for lint command processing
    """
    options = process_lint_args(sys.argv[1:])
    lint = Lint(options)
    sys.exit(lint.run())