Python gi 模块，require_version() 实例源码

def get_gi_libdir(module, version):
    statement = """
        import gi
        gi.require_version("GIRepository", "2.0")
        from gi.repository import GIRepository
        repo = GIRepository.Repository.get_default()
        module, version = (%r, %r)
        repo.require(module, version,
                     GIRepository.RepositoryLoadFlags.IREPOSITORY_LOAD_FLAG_LAZY)
        print(repo.get_shared_library(module))
    """
    statement %= (module, version)
    libs = exec_statement(statement).split(',')
    for lib in libs:
        path = findSystemLibrary(lib.strip())
        return os.path.normpath(os.path.dirname(path))

    raise ValueError("Could not find libdir for %s-%s" % (module, version))

def main():
    import gi
    gi.require_version('Gtk', '3.0')
    gi.require_version('Rsvg', '2.0')
    gi.require_version('GdkX11', '3.0')

    from scc.tools import init_logging
    from scc.paths import get_share_path
    init_logging()

    gd = GestureDisplay()
    if not gd.parse_argumets(sys.argv):
        sys.exit(1)
    gd.run()
    if gd.get_exit_code() == 0:
        print gd.get_gesture()
    else:
        sys.exit(gd.get_exit_code())

def test_packages(self):
        """
        Tests if every known Action is documentated in docs/actions.md
        """
        try:
            import gi
            gi.require_version('Gtk', '3.0') 
            gi.require_version('GdkX11', '3.0') 
            gi.require_version('Rsvg', '2.0') 
        except ImportError:
            pass

        from setup import packages
        for importer, modname, ispkg in pkgutil.walk_packages(path=scc.__path__, prefix="scc.", onerror=lambda x: None):
            if ispkg:
                assert modname in packages, "Package '%s' is not being installed by setup.py" % (modname,)

def _gst_available():
    """Determine whether Gstreamer and the Python GObject bindings are
    installed.
    """
    try:
        import gi
    except ImportError:
        return False

    try:
        gi.require_version('Gst', '1.0')
    except (ValueError, AttributeError):
        return False

    try:
        from gi.repository import Gst  # noqa
    except ImportError:
        return False

    return True

def is_quartz():
    """
    Tests to see if Python is currently running with gtk and
    windowing system is Mac OS-X's "quartz".
    """
    if mac():
        try:
            import gi
            gi.require_version('Gtk', '3.0')
            gi.require_version('Gdk', '3.0')
            from gi.repository import Gtk
            from gi.repository import Gdk
        except ImportError:
            return False
        return Gdk.Display.get_default().__class__.__name__.endswith("QuartzDisplay")
    return False

def get_gi_libdir(module, version):
    statement = """
        import gi
        gi.require_version("GIRepository", "2.0")
        from gi.repository import GIRepository
        repo = GIRepository.Repository.get_default()
        module, version = (%r, %r)
        repo.require(module, version,
                     GIRepository.RepositoryLoadFlags.IREPOSITORY_LOAD_FLAG_LAZY)
        print(repo.get_shared_library(module))
    """
    statement %= (module, version)
    libs = exec_statement(statement).split(',')
    for lib in libs:
        path = findSystemLibrary(lib.strip())
        return os.path.normpath(os.path.dirname(path))

    raise ValueError("Could not find libdir for %s-%s" % (module, version))

def backend_gtk3agg_internal_check(x):
    try:
        import gi
    except ImportError:
        return (False, "Requires pygobject to be installed.")

    try:
        gi.require_version("Gtk", "3.0")
    except ValueError:
        return (False, "Requires gtk3 development files to be installed.")
    except AttributeError:
        return (False, "pygobject version too old.")

    try:
        from gi.repository import Gtk, Gdk, GObject
    except (ImportError, RuntimeError):
        return (False, "Requires pygobject to be installed.")

    return (True, "version %s.%s.%s" % (
        Gtk.get_major_version(),
        Gtk.get_micro_version(),
        Gtk.get_minor_version()))

def import_optional():
    """Safe module import"""
    success = AttributeDict()
    try:
        gi.require_version('Gst', '1.0')
        from gi.repository import Gst  # noqa: F401
        success.gstreamer = True
    except Exception:
        success.gstreamer = False
        logger.warning("Fail to import Gstreamer module")

    try:
        from PIL import Image  # noqa: F401
        success.pillow = True
    except Exception:
        success.pillow = False
        logger.warning("Fail to import Pillow module")

    return success

def monitor_geometry():
    "Return the current monitor geometry"
    import gi
    gi.require_version('Gdk', '3.0')
    from gi.repository import Gdk
    from collections import namedtuple
    MonitorGeometry = namedtuple(
        'MonitorGeometry',
        ['left', 'right', 'top', 'bottom', 'width', 'height'],
    )

    display = Gdk.Display.get_default()
    screen = display.get_default_screen()
    window = screen.get_active_window()
    monitor = screen.get_monitor_at_window(window)

    g = screen.get_monitor_geometry(monitor)
    right = g.x + g.width
    bottom = g.y + g.height
    return MonitorGeometry(g.x, right, g.y, bottom, g.width, g.height)

def import_osd():
    import gi
    gi.require_version('Gtk', '3.0')
    gi.require_version('Rsvg', '2.0')
    gi.require_version('GdkX11', '3.0')

def cmd_dependency_check(argv0, argv):
    """ Checks if all required libraries are installed on this system """
    try:
        import gi
        gi.require_version('Gtk', '3.0') 
        gi.require_version('GdkX11', '3.0') 
        gi.require_version('Rsvg', '2.0') 
    except ValueError, e1:
        print >>sys.stderr, e1
        if "Rsvg" in str(e1):
            print >>sys.stderr, "Please, install 'gir1.2-rsvg-2.0' package to use this application"
        else:
            print >>sys.stderr, "Please, install 'PyGObject' package to use this application"
    except ImportError, e2:
        print e2
        return 1
    try:
        import evdev
    except Exception, e:
        print >>sys.stderr, e
        print >>sys.stderr, "Please, install python-evdev package to enable non-steam controller support"
    try:
        import scc.lib.xwrappers as X
        X.Atom
    except Exception, e:
        print >>sys.stderr, e
        print >>sys.stderr, "Failed to load X11 helpers, please, check your X installation"
        return 1
    return 0

def has_display():
    """
    Tests to see if Python is currently running with gtk
    """
    # FIXME: currently, Gtk.init_check() requires all strings
    # in argv, and we might have unicode.
    temp, sys.argv = sys.argv, sys.argv[:1]
    try:
        import gi
        gi.require_version('Gtk', '3.0')
        gi.require_version('Gdk', '3.0')
        from gi.repository import Gtk
        from gi.repository import Gdk
    except ImportError:
        return False

    try:
        test = Gtk.init_check(temp) and \
            Gdk.Display.get_default()
        sys.argv = temp
        return bool(test)
    except:
        sys.argv = temp
        return False

# A couple of places add menu accelerators using <alt>, which doesn't
# work with Gtk-quartz. <Meta> is the usually correct replacement, but
# in one case the key is a number, and <meta>number is used by Spaces
# (a mac feature), so we'll use control instead.

def gui():
    """Start the graphical user interface."""
    try:
        import gi
        gi.require_version("Gtk", "3.0")
        from gi.repository import Gtk
    except ImportError:
        print("Sorry, this needs pygobject to be installed!")
        sys.exit()

    win = Gtk.Window(title="Set display brightness")

    ad1 = Gtk.Adjustment(value=get_actual_brightness(), lower=11, upper=255)
    scale = Gtk.Scale(orientation=Gtk.Orientation.HORIZONTAL, adjustment=ad1)

    def on_scale_changed(s, _):
        value = int(s.get_value())
        set_brightness(value)

    scale.connect("button-release-event", on_scale_changed)
    scale.connect("key_release_event", on_scale_changed)
    scale.connect("scroll-event", on_scale_changed)
    scale.set_size_request(350, 50)

    # Main Container
    main_container = Gtk.Fixed()
    main_container.put(scale, 10, 10)

    # Main Window
    win.connect("delete-event", Gtk.main_quit)
    win.connect("destroy", Gtk.main_quit)
    win.add(main_container)
    win.resize(400, 50)
    win.set_position(Gtk.WindowPosition.CENTER)

    win.show_all()
    Gtk.main()

def test_gi_gst_binding(pyi_builder):
    pyi_builder.test_source('''
        import gi
        gi.require_version('Gst', '1.0')
        from gi.repository import Gst
        Gst.init(None)
        print(Gst)
    ''')


## For PyGObject >= 2.0

# Names of all "gi.repository" packages provided by PyGObject >= 2.0 to be
# tested below, typically corresponding to those packages hooked by PyInstaller.

def test_gi2_repository(pyi_builder, repository_name):
    '''
    Test the importability of the `gi.repository` subpackage with the passed
    name installed with PyGObject >= 2.0 (e.g., `GLib`, corresponding to the
    `gi.repository.GLib` subpackage).
    '''

    # Test the importability of this subpackage.
    pyi_builder.test_source('''
        import gi
        gi.require_version('{repository_name}', '2.0')
        from gi.repository import {repository_name}
        print({repository_name})
        '''.format(repository_name=repository_name))

def get_glib_system_data_dirs():
    statement = """
        import gi
        gi.require_version('GLib', '2.0')
        from gi.repository import GLib
        print(GLib.get_system_data_dirs())
    """
    data_dirs = eval_statement(statement)
    if not data_dirs:
        logger.error("gi repository 'GIRepository 2.0' not found. "
                     "Please make sure libgirepository-gir2.0 resp. "
                     "lib64girepository-gir2.0 is installed.")
        # :todo: should we raise a SystemError here?
    return data_dirs

def __init__(self, player):
        self.player = player
        self.logger = logging.getLogger('KeyboardClient')

        try:
            import gi
            gi.require_version('Keybinder', '3.0')
            from gi.repository import Keybinder
            Keybinder.init()
            Keybinder.bind('XF86AudioPlay', self._on_XF86AudioPlay)
            Keybinder.bind('XF86AudioNext', self._on_XF86AudioNext)
            Keybinder.bind('XF86AudioPrev', self._on_XF86AudioPrev)
        except ValueError:
            self.logger.warning('Keybinder is needed on Linux for MediaKey binding')

def backend_gtk3cairo_internal_check(x):
    try:
        import cairocffi
    except ImportError:
        try:
            import cairo
        except ImportError:
            return (False, "Requires cairocffi or pycairo to be installed.")

    try:
        import gi
    except ImportError:
        return (False, "Requires pygobject to be installed.")

    try:
        gi.require_version("Gtk", "3.0")
    except ValueError:
        return (False, "Requires gtk3 development files to be installed.")
    except AttributeError:
        return (False, "pygobject version too old.")

    try:
        from gi.repository import Gtk, Gdk, GObject
    except (RuntimeError, ImportError):
        return (False, "Requires pygobject to be installed.")

    return (True, "version %s.%s.%s" % (
        Gtk.get_major_version(),
        Gtk.get_micro_version(),
        Gtk.get_minor_version()))