convert to string for py3
convert to string for py3

mgraupe/acq4,jlombacher/pyqtgraph,gvalentine/pyqtgraph,mpvismer/pyqtgraph,duguxy/pyqtgraph,tropp/acq4,onlyjus/pyqtgraph,pmaunz/pyqtgraph,gvalentine/pyqtgraph,acq4/acq4,mgraupe/acq4,meganbkratz/acq4,derricw/pyqtgraph,mpvismer/pyqtgraph,gvalentine/pyqtgraph,petebachant/pyqtgraph,pmaunz/pyqtgraph,ng110/pyqtgraph,carlomt/dicom_tools,tropp/acq4,ericdill/pyqtgraph,meganbkratz/acq4,meganbkratz/acq4,onlyjus/pyqtgraph,acq4/acq4,acq4/acq4,ericdill/pyqtgraph,pbmanis/acq4,benvermaercke/pyqtgraph,ddamiani/pyqtgraph,benvermaercke/pyqtgraph,onlyjus/pyqtgraph,ddamiani/pyqtgraph,pbmanis/acq4,nmearl/pyqtgraph,JenSte/pyqtgraph,campagnola/acq4,duguxy/pyqtgraph,campagnola/acq4,stscieisenhamer/pyqtgraph,acq4/acq4,ng110/pyqtgraph,campagnola/acq4,JenSte/pyqtgraph,pbmanis/acq4,ericdill/pyqtgraph,benvermaercke/pyqtgraph,mgraupe/acq4,welshjf/pyqtgraph,ddamiani/pyqtgraph,jlombacher/pyqtgraph,petebachant/pyqtgraph,campagnola/acq4,mgraupe/acq4,meganbkratz/acq4,derricw/pyqtgraph,pbmanis/acq4,stscieisenhamer/pyqtgraph,tropp/acq4,welshjf/pyqtgraph,carlomt/dicom_tools,mgraupe/acq4,welshjf/pyqtgraph,tropp/acq4,nmearl/pyqtgraph