I'm trying to delete a Picture Element from 45 MXDs. This code is a start for me:

    import arcpy
    from arcpy import env
    
    env.workspace = r"G:\PROJECTS\landuse\gis"
    for mxdname in arcpy.ListFiles("*.mxd"):
        mxd = arcpy.mapping.MapDocument(
                    r"G:\PROJECTS\landuse\gis\\" + mxdname)
        for elm in arcpy.mapping.ListLayoutElements(mxd,"PICTURE_ELEMENT"):
            if elm.name == "F:\GIS\practical_shapefile\notes\aer1_logo1.jpg":
                elm.sourceImage =r"F:\GIS\practical_shapefile\general\esd_logo1.jpg"
                mxd.save()
    del mxd

   

I read:

 - http://desktop.arcgis.com/en/arcmap/10.3/analyze/arcpy-mapping/listlayoutelements.htm
 - http://desktop.arcgis.com/en/arcmap/latest/analyze/arcpy-mapping/pictureelement-class.htm

but didn't find any hint how to do it.