request.py 文件源码

def get_local_filename(self):
        """ get_local_filename()
        If the filename is an existing file on this filesystem, return
        that. Otherwise a temporary file is created on the local file
        system which can be used by the format to read from or write to.
        """

        if self._uri_type == URI_FILENAME:
            return self._filename
        else:
            # Get filename
            ext = os.path.splitext(self._filename)[1]
            self._filename_local = tempfile.mktemp(ext, 'imageio_')
            # Write stuff to it?
            if self.mode[0] == 'r':
                with open(self._filename_local, 'wb') as file:
                    shutil.copyfileobj(self.get_file(), file)
            return self._filename_local