Make code compatible with older Python versions
Make code compatible with older Python versions

UITools/saleor,UITools/saleor,UITools/saleor,mociepka/saleor,UITools/saleor,mociepka/saleor,maferelo/saleor,maferelo/saleor,maferelo/saleor,mociepka/saleor,UITools/saleor