utils.py 文件源码

def handle_var(value, context):
    """
    Handle template tag variable
    """
    # Resolve FilterExpression and Variable immediately
    if isinstance(value, FilterExpression) or isinstance(value, Variable):
        return value.resolve(context)
    # Return quoted strings unquoted
    # http://djangosnippets.org/snippets/886
    stringval = QUOTED_STRING.search(value)
    if stringval:
        return stringval.group('noquotes')
    # Resolve variable or return string value
    try:
        return Variable(value).resolve(context)
    except VariableDoesNotExist:
        return value