Python PIL.Image 模块，init() 实例源码

def get_bytes(self, format='PNG'):
        '''
        usage:  i = Identicon('xx')
                print(i.base64())
        return: this image's base64 code
        created by: liuzheng712
        bug report: https://github.com/liuzheng712/identicons/issues
        '''
        self.calculate()
        fp = io.BytesIO()
        self.image.encoderinfo = {}
        self.image.encoderconfig = ()

        if format.upper() not in Image.SAVE:
            Image.init()
        save_handler = Image.SAVE[format.upper()]
        try:
            save_handler(self.image, fp, '')
        finally:
            fp.seek(0)
            return fp

def test_pil_plugins(pyi_builder):
    pyi_builder.test_source(
        """
        # Verify packaging of PIL.Image. Specifically, the hidden import of FixTk
        # importing tkinter is causing some problems.
        from PIL.Image import fromstring
        print(fromstring)

        # PIL import hook should bundle all available PIL plugins. Verify that plugins
        # are bundled.
        from PIL import Image
        Image.init()
        MIN_PLUG_COUNT = 7  # Without all plugins the count is usually 6.
        plugins = list(Image.SAVE.keys())
        plugins.sort()
        if len(plugins) < MIN_PLUG_COUNT:
            raise SystemExit('No PIL image plugins were bundled!')
        else:
            print('PIL supported image formats: %s' % plugins)
        """)

def test_pil_plugins(pyi_builder):
    pyi_builder.test_source(
        """
        # Verify packaging of PIL.Image. Specifically, the hidden import of FixTk
        # importing tkinter is causing some problems.
        from PIL.Image import fromstring
        print(fromstring)

        # PIL import hook should bundle all available PIL plugins. Verify that plugins
        # are bundled.
        from PIL import Image
        Image.init()
        MIN_PLUG_COUNT = 7  # Without all plugins the count is usually 6.
        plugins = list(Image.SAVE.keys())
        plugins.sort()
        if len(plugins) < MIN_PLUG_COUNT:
            raise SystemExit('No PIL image plugins were bundled!')
        else:
            print('PIL supported image formats: %s' % plugins)
        """)

def get_available_image_extensions():
    try:
        from PIL import Image
    except ImportError:
        return []
    else:
        Image.init()
        return [ext.lower()[1:] for ext in Image.EXTENSION.keys()]

def get_available_image_extensions():
    try:
        from PIL import Image
    except ImportError:
        return []
    else:
        Image.init()
        return [ext.lower()[1:] for ext in Image.EXTENSION.keys()]

def test_pyttsx(pyi_builder):
    pyi_builder.test_source(
        """
        # Basic code example from pyttsx tutorial.
        # http://packages.python.org/pyttsx/engine.html#examples
        import pyttsx
        engine = pyttsx.init()
        engine.say('Sally sells seashells by the seashore.')
        engine.say('The quick brown fox jumped over the lazy dog.')
        engine.runAndWait()
        """)

def get_available_image_extensions():
    try:
        from PIL import Image
    except ImportError:
        return []
    else:
        Image.init()
        return [ext.lower()[1:] for ext in Image.EXTENSION.keys()]

def save_image(image, destination=None, filename=None, **options):
    """
    Save a PIL image.
    """
    if destination is None:
        destination = BytesIO()
    filename = filename or ''
    # Ensure plugins are fully loaded so that Image.EXTENSION is populated.
    Image.init()
    format = Image.EXTENSION.get(os.path.splitext(filename)[1].lower(), 'JPEG')
    if format in ('JPEG', 'WEBP'):
        options.setdefault('quality', 85)
    saved = False
    if format == 'JPEG':
        if settings.THUMBNAIL_PROGRESSIVE and (
                max(image.size) >= settings.THUMBNAIL_PROGRESSIVE):
            options['progressive'] = True
        try:
            image.save(destination, format=format, optimize=1, **options)
            saved = True
        except IOError:
            # Try again, without optimization (PIL can't optimize an image
            # larger than ImageFile.MAXBLOCK, which is 64k by default). This
            # shouldn't be triggered very often these days, as recent versions
            # of pillow avoid the MAXBLOCK limitation.
            pass
    if not saved:
        image.save(destination, format=format, **options)
    if hasattr(destination, 'seek'):
        destination.seek(0)
    return destination

def get_available_image_extensions():
    try:
        from PIL import Image
    except ImportError:
        return []
    else:
        Image.init()
        return [ext.lower()[1:] for ext in Image.EXTENSION.keys()]

def __init__(self, service_name='images', host_prefix=''):
    """Preloads PIL to load all modules in the unhardened environment.

    Args:
      service_name: Service name expected for all calls.
      host_prefix: the URL prefix (protocol://host:port) to preprend to
        image urls on a call to GetUrlBase.
    """
    super(ImagesServiceStub, self).__init__(
        service_name, max_request_size=MAX_REQUEST_SIZE)
    self._blob_stub = images_blob_stub.ImagesBlobStub(host_prefix)
    Image.init()

def get_available_image_extensions():
    try:
        from PIL import Image
    except ImportError:
        return []
    else:
        Image.init()
        return [ext.lower()[1:] for ext in Image.EXTENSION.keys()]

def test_pyttsx(pyi_builder):
    pyi_builder.test_source(
        """
        # Basic code example from pyttsx tutorial.
        # http://packages.python.org/pyttsx/engine.html#examples
        import pyttsx
        engine = pyttsx.init()
        engine.say('Sally sells seashells by the seashore.')
        engine.say('The quick brown fox jumped over the lazy dog.')
        engine.runAndWait()
        """)

def get_available_image_extensions():
    try:
        from PIL import Image
    except ImportError:
        return []
    else:
        Image.init()
        return [ext.lower()[1:] for ext in Image.EXTENSION.keys()]

def calculate(self):
        """
        Creates the identicon.
        First three bytes are used to generate the color,
        remaining bytes are used to create the drawing
        """
        color = (self.hash & 0xff, self.hash >> 8 & 0xff, self.hash >> 16 & 0xff)
        self.hash >>= 24  # skip first three bytes
        square_x = square_y = 0  # init square position
        for x in range(GRID_SIZE * (GRID_SIZE + 1) // 2):
            if self.hash & 1:
                x = BORDER_SIZE + square_x * SQUARE_SIZE
                y = BORDER_SIZE + square_y * SQUARE_SIZE
                self.draw.rectangle(
                    (x, y, x + SQUARE_SIZE, y + SQUARE_SIZE),
                    fill=color,
                    outline=color
                )
                # following is just for mirroring
                x = BORDER_SIZE + (GRID_SIZE - 1 - square_x) * SQUARE_SIZE
                self.draw.rectangle(
                    (x, y, x + SQUARE_SIZE, y + SQUARE_SIZE),
                    fill=color,
                    outline=color
                )
            self.hash >>= 1  # shift to right
            square_y += 1
            if square_y == GRID_SIZE:  # done with first column
                square_y = 0
                square_x += 1