Raster merge using rasterio

rastermerege-rasterio,py

import rasterio.merge

bounds=None
res=None
nodata=None
precision=7

def merge(input1,bounds, res, nodata, precision):
    import warnings
    warnings.warn("Deprecated; Use rasterio.merge instead", DeprecationWarning)
    return rasterio.merge.merge(input1, bounds, res, nodata, precision)

dataset1 = rasterio.open("raster1.tif")
dataset2 = rasterio.open("raster2.tif")


dest, output_transform=merge([dataset1,dataset2],bounds, res, nodata, precision)
with rasterio.open("raster1.tif") as src:
        out_meta = src.meta.copy()    
out_meta.update({"driver": "GTiff",
                 "height": dest.shape[1],
                 "width": dest.shape[2],
                 "transform": output_transform})
with rasterio.open("mergedRasters.tif", "w", **out_meta) as dest1:
        dest1.write(dest)