def __init__(self, filename):
self.root_values = {}<EOL>self.tree = []<EOL>if filename is not None and os.path.dirname(filename) == '<STR_LIT>':<EOL><INDENT>self.original_filename = os.path.join(os.getcwd(), filename)<EOL><DEDENT>else:<EOL><INDENT>self.original_filename = filename<EOL><DEDENT>if filename is not None:<EOL><INDENT>self.sax_parse(filename)<EOL><DEDENT>
A container for a SAX SVG light tree objects document.

        This class provides functions for extracting SVG data into Path objects.

        Args:
            filename (str): The filename of the SVG file