Function _parse_path_variables

dash/_pages.py:124–148

creates the dict of path variables passed to the layout e.g. path_template= "/asset/ " if pathname provided by the browser is "/assets/a100" returns **{"asset_id": "a100"}

(pathname, path_template)

def _parse_path_variables(pathname, path_template):
    """
    creates the dict of path variables passed to the layout
    e.g. path_template= "/asset/<asset_id>"
         if pathname provided by the browser is "/assets/a100"
         returns **{"asset_id": "a100"}
    """

    # parse variable definitions e.g. <var_name> from template
    # and create pattern to match
    wildcard_pattern = re.sub("<.*?>", "*", path_template)
    var_pattern = re.sub("<.*?>", "(.*)", path_template)

    # check that static sections of the pathname match the template
    if not fnmatch(pathname, wildcard_pattern):
        return None

    # parse variable names e.g. var_name from template
    var_names = re.findall("<(.*?)>", path_template)

    # parse variables from path
    variables = re.findall(var_pattern, pathname)
    variables = variables[0] if isinstance(variables[0], tuple) else variables

    return dict(zip(var_names, variables))


def _set_redirect(redirect_from, path):