How to convert float raster to vector with python GDAL

I have float raster and now I want to convert it to vector. How is it possible with python gdal library? I have tried with gdal_polygonize.py of gdal utilities in command line and it worked excellent. But this utility works on GDALPolygonize() of c++ library. But I want to work on another method of c++ named GDALFPolygonize(), which manipulates float raster data as far as I know. Thanks.