gallery.py 文件源码

def get_safe_value(self, key):
        """
        Get the meta value or an empty string.

        http://python3-exiv2.readthedocs.io/en/latest/api.html
        http://python3-exiv2.readthedocs.io/en/latest/tutorial.html
        """
        try:
            val = self.meta[key].value
            if self.meta[key].repeatable:
                return val

            return val[0]

        except KeyError:
            return ''