TypeError: 'encoding' is an invalid keyword argument for this function While running SMOKE

I am running SMOKE v4.81 for a EPA 2016v2 platform using inputs from here ftp://newftp.epa.gov/air/emismod/2016/v2/

The SMOKE runs looks successful except the following error:

Is it a serious error?. Would you please suggest how to solve this error?

Thanks in advance

Okay, I solved the error by updating default python version2 to version3 in my system.