Access pixel of raster data in Python using GDAL

from osgeo import gdal
rds = gdal.Open("/gdata/geotiff_file.tif")
band = rds.GetRasterBand(1)

band.DataTyp

from osgeo import gdal

data = gdal.Open(path)
band = data.GetRasterBand(1) 

band.GetMetadata('IMAGE_STRUCTURE')