python 验证数据类型函数

2023-09-11 阅读 24 评论 0

摘要：在查看谷歌API类时发现这个函数，发现有问题,先上原函数: 1 def ValidateTypes(vars_tpl): 2 """Checks that each variable in a set of variables is the correct type. 3 4 Args: 5 vars_tpl: A tuple containing a set of variables to check. 6 7 Rais

在查看谷歌API类时发现这个函数，发现有问题,先上原函数:

 1 def ValidateTypes(vars_tpl):
 2   """Checks that each variable in a set of variables is the correct type.
 3 
 4   Args:
 5     vars_tpl: A tuple containing a set of variables to check.
 6 
 7   Raises:
 8     ValidationError: The given object was not one of the given accepted types.
 9   """
10   for var, var_types in vars_tpl:
11     if not isinstance(var_types, tuple):
12       var_types = (var_types,)
13     for var_type in var_types:
14       if isinstance(var, var_type):
15         return
16     msg = ('The \'%s\' is of type %s, expecting one of %s.'
17            % (var, type(var), var_types))
18     raise ValidationError(msg)
19 
20 
21  d = {'d':1}
22  e = (1,2,3)
23  ValidateTypes(((d, dict), (e, list)))

任何数据类型都可以通过转化函数？代码通过验证，本来e是tuple,用来验证的类是list,应该抛错才对，因为15行那里用了return返回，所以后面的验证不再进行。

修改后的函数如下：

 1 def ValidateTypes(vars_tpl):
 2   """Checks that each variable in a set of variables is the correct type.
 3 
 4   Args:
 5     vars_tpl: A tuple containing a set of variables to check.
 6 
 7   Raises:
 8     ValidationError: The given object was not one of the given accepted types.
 9   """
10   if not isinstance(vars_tpl, tuple):
11     raise ValidationError("vars_tpl argument must be tuple")
12   for var, var_types in vars_tpl:
13     if not isinstance(var_types, tuple):
14       var_types = (var_types,)
15     msg = ('The \'%s\' is of type %s, expecting one of %s.'
16            % (var, type(var), var_types))
17 
18     for var_type in var_types:
19       if not isinstance(var, var_type):
20         raise ValidationError(msg)