exiftool.py 文件源码

def execute_json(self, *params):
        """Execute the given batch of parameters and parse the JSON output.

        This method is similar to :py:meth:`execute()`.  It
        automatically adds the parameter ``-j`` to request JSON output
        from ``exiftool`` and parses the output.  The return value is
        a list of dictionaries, mapping tag names to the corresponding
        values.  All keys are Unicode strings with the tag names
        including the ExifTool group name in the format <group>:<tag>.
        The values can have multiple types.  All strings occurring as
        values will be Unicode strings.  Each dictionary contains the
        name of the file it corresponds to in the key ``"SourceFile"``.

        The parameters to this function must be either raw strings
        (type ``str`` in Python 2.x, type ``bytes`` in Python 3.x) or
        Unicode strings (type ``unicode`` in Python 2.x, type ``str``
        in Python 3.x).  Unicode strings will be encoded using
        system's filesystem encoding.  This behaviour means you can
        pass in filenames according to the convention of the
        respective Python version – as raw strings in Python 2.x and
        as Unicode strings in Python 3.x.
        """
        params = map(fsencode, params)
        return json.loads(self.execute(b"-j", *params).decode("utf-8"))