__init__.py 文件源码

def show(self, wait=1.2, scale=10, module_color=(0, 0, 0, 255),
            background=(255, 255, 255, 255), quiet_zone=4):
        """Displays this QR code.

        This method is mainly intended for debugging purposes.

        This method saves the output of the :py:meth:`png` method (with a default
        scaling factor of 10) to a temporary file and opens it with the
        standard PNG viewer application or within the standard webbrowser. The
        temporary file is deleted afterwards.

        If this method does not show any result, try to increase the `wait`
        parameter. This parameter specifies the time in seconds to wait till
        the temporary file is deleted. Note, that this method does not return
        until the provided amount of seconds (default: 1.2) has passed.

        The other parameters are simply passed on to the `png` method.
        """
        import os
        import time
        import tempfile
        import webbrowser

        try:  # Python 2
            from urlparse import urljoin
            from urllib import pathname2url
        except ImportError:  # Python 3
            from urllib.parse import urljoin
            from urllib.request import pathname2url

        f = tempfile.NamedTemporaryFile('wb', suffix='.png', delete=False)
        self.png(f, scale=scale, module_color=module_color,
                 background=background, quiet_zone=quiet_zone)
        f.close()
        webbrowser.open_new_tab(urljoin('file:', pathname2url(f.name)))
        time.sleep(wait)
        os.unlink(f.name)