我可以确保导入我的Python代码的用户使用Unicode文字吗? [英] Can I ensure that users that import my Python code use Unicode literals?
问题描述
我的代码包括
from __future__ import unicode_literals
并具有许多接受(并期望)Unicode字符串作为输入以便完全发挥作用的功能.
and has many functions that accept (and expect) Unicode strings as input in order to function fully.
有没有一种方法可以确保用户(在脚本,Python或IPython等中)也使用Unicode文字,例如,
Is there a way to ensure that users (in scripts, Python, or IPython, etc.) also use Unicode literals so that, for example
my_func("AβC")
不会引起错误("ascii"编解码器无法解码字节0xce ..."),因此
does not cause an error ("ascii' codec can't decode byte 0xce ...") and so that
my_func(u"AβC")
不是必需的吗?
推荐答案
否,unicode_literals
是每个模块的配置,必须在要使用它的每个模块中导入.
No, unicode_literals
is a per-module configuration and must be imported in each and every module where it is to be used.
最好的方法就是在my_func
的文档字符串中提及您希望使用unicode对象的地方.
The best way is just to mention it in the docstring of my_func
that you are expecting unicode objects.
如果您坚持认为,可以强制使其尽早失败:
If you insist, you could enforce it to fail early:
def my_func(my_arg):
if not isinstance(my_arg, unicode):
raise Exception('This function only handles unicode inputs')
如果您在许多地方都需要它,则最好使用装饰器来实现它.
If you need it in many places, it might be nicer to implement it with a decorator.
在python3.5或更高版本上,您可以使用类型提示来强制执行.
On python3.5 or up, you could use type hints to enforce this.
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