Sync project extents with base

arcpy_sync.py

arcpy.env.workspace = "."
current_mxd = arcpy.mapping.MapDocument("CURRENT")
current_dfs = arcpy.mapping.ListDataFrames(current_mxd)
project_filename = current_mxd.filePath.split('\\')[-1]
project_name = project_filename[:-4].split('_')[0]
project_scale = project_filename[:-4].split('_')[-1]
plan_filename = "{}_RysunekPlanu_{}.mxd".format(project_name, project_scale)
plan_mxd = arcpy.mapping.MapDocument(plan_filename)
source_dfs = arcpy.mapping.ListDataFrames(plan_mxd)
for index in range(len(source_dfs)):
    current_dfs[index].extent = source_dfs[index].extent

current_mxd.save()