Make a loop that will take the same name pairs from two folders?

Question

One main folder that has one folder named old and another called new

The old has some folders. The new has a few of these folders with same names and nothing more.

I want to delete the folders of the old that are not present in the new first and then: make a loop that will take each file -same name -pair, and put it in the the following line:

arcpy.Append_management(["shpfromonefolder.shp", "shpfromsecondfolder.shp"],"NO_TEST")

for example: land.shp from one folder with land.shp from the other folder so it will be:

arcpy.Append_management(["land.shp", "land.shp"],"NO_TEST")

Answer 1

This will delete folders in old_path if they exist do not in new_path:

import os
import shutil

old_path = r"old file path"
new_path = r"old file path"

for folder in os.listdir(old_path):
    if folder not in os.listdir(new_path):
        shutil.rmtree(os.path.join(old_path, folder))

This will find the matching shape files and pass them to arcpy.Append_management():

import os
import arcpy

for dir_path, dir_names, file_names in arcpy.da.Walk(workspace=new_path, datatype="FeatureClass"):
    for filename in file_names:
        new_file_path = os.path.join(dir_path, filename)
        folder = os.path.basename(os.path.dirname(new_file_path))
        old_file_path = os.path.join(old_path, folder, filename)

        if os.path.exists(old_file_path):
            arcpy.Append_management(inputs=[new_file_path], target=old_file_path, schema_type="NO_TEST")