print mapDoc
mxd = arcpy.mapping.MapDocument(path_copy + mapDoc)
for df in arcpy.mapping.ListDataFrames(mxd):
    for lyr_o in arcpy.mapping.ListLayers(mxd,"",df):
        for lyr_u in arcpy.mapping.ListLayers(updatedMxd,""):
            if lyr_o.name == lyr_u.name:
                arcpy.mapping.UpdateLayer(df,lyr_o,lyr_u,False)
mxd.save()
pdf_name = mapDoc[:-4] + ".pdf"
arcpy.mapping.ExportToPDF(mxd,pdf_name)
print pdf_name
del mxd