templates.py 文件源码

def parse(self, needle=()):
        start_lineno = self.lineno
        result = []
        add = result.append
        for self.lineno, token, value in self.gen:
            if token == 'data':
                add(self.parse_data(value))
            elif token == 'code':
                add(self.parse_code(value.splitlines()))
            elif token == 'cmd':
                name, args = value
                if name in needle:
                    return name, args, ast.Stmt(result, lineno=start_lineno)
                if name in ('for', 'while'):
                    add(self.parse_loop(args, name))
                elif name == 'if':
                    add(self.parse_if(args))
                else:
                    self.fail('unknown directive %s' % name)
        if needle:
            self.fail('unexpected end of template')
        return ast.Stmt(result, lineno=start_lineno)