stringable.py 文件源码

def __init__(self, name, template, valid_values={}):
        self.template_pieces = []
        self.field_names = []
        parsed = FORMATTER.parse(template)
        for (literal_text, field_name, format_spec, conversion) in parsed:
            assert not conversion
            self.template_pieces.append((literal_text, field_name))
            if field_name not in self.field_names:
                self.field_names.append(field_name)

        self.name = name
        self.template = template
        self.compiled_template = parse.compile(template)
        self.tuple_class = collections.namedtuple(
            self.name,
            list(self.field_names))

        self.valid_values = dict(valid_values)
        for key in self.valid_values:
            assert key in self.field_names