The validate-docbr class for Inscrição Estadual is IE (uppercase), not ie. Python imports are case-sensitive — ie does not exist in the module.
The class abbreviates Inscrição Estadual as IE — all caps. Use the exact casing.
from validate_docbr import IE
ie = IE()
print(ie.validate("111.111.111.111")) # False
print(ie.generate()) # valid IE string