什么是setattr（）用于模块的pythonic方法？

Question

In a class method, I can add attributes using the built-in function:

setattr(self, "var_name", value).  

If I want to do the same thing within a module, I can do something like:

globals()["var_name"] = value

Is this the best way to do this, or is there a more pythonic solution?

Answer 1

Your suggested approach

globals()["var_name"] = value

is indeed the most Pythonic way. In particular, it's significantly more Pythonic than using eval , which would be your main (though not only) alternative.

However, if you still want to use setattr , you may do so by using sys.modules to get a reference to the current module object with the current module's __name__ variable ( explained here ) as follows:

import sys
setattr(sys.modules[__name__], "var_name", value)