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How do I copy subfolders into another location

I'm making a program to back up files and folders to a destination.
The problem I'm currently facing is if I have a folder inside a folder and so on, with files in between them, I can't Sync them at the destination.
e.g.:
The source contains folder 1 and file 2. Folder 1 contains folder 2, folder 2 contains folder 3 and files etc...
The backup only contains folder 1 and file 2.
If the backup doesn't exist I simply use: shutil.copytree(path, path_backup), but in the case, I need to sync I can't get the files and folders or at least I'm not seeing a way to do it. I have walked the directory with for path, dir, files in os.walk(directory) and even used what someone suggest in another post:
def walk_folder(target_path, path_backup):
for files in os.scandir(target_path):
if os.path.isfile(files):
file_name = os.path.abspath(files)
print(file_name)
os.makedirs(path_backup)
elif os.path.isdir(files):
walk_folder(files, path_backup)
Is there a way to make the directories in the backup folder from the ground up and then add the info alongside or is the only way to just delete the whole folder and use shutil.copytree(path, path_backup).
With makedirs, all it does is say it can't create because the folder already exists, this is understandable as it's trying to write in the Source folder and not in the backup. Is there a way to make the path to replace Source for backup?
If any more code is needed feel free to ask!

How to run python script for every folder in directory and skip any empty folders?

I am trying to figure out how to generate an excel workbook for each subfolder in my directory while skipping the folders that are empty. My directory structure is below.
So it would start with Folder A, execute my lines of code to create an excel file using Folder A's contents, then move to Folder B, execute my lines of code to create a separate excel file using Folder B's contents, then move to Folder C and skip it since it's empty, and continue on.
How do I loop through each folder in this manner and keep going when a folder is empty?
I would greatly appreciate the help!
myscript.py
folderA
- report1.xlsx
- report2.xlsx
folderB
- report1.xlsx
- report2.xlsx
folderC
** EMPTY **
folderD
- report1.xlsx
- report2.xlsx

Something like this maybe?
from pathlib import Path
from itertools import groupby
def by_folder(path):
return path.parent
for folder, files in groupby(Path("path/to/root/dir").rglob("*.xlsx"), key=by_folder):
print(f"Gonna merge these files from {folder}: ")
for file in files:
print(f"{file.name}")
print()
We recursively search for .xlsx files in the root directory, and group files into lists based on the immediate common parent folder. If a folder is empty, it won't be matched by the glob pattern.

You can use the os.listdir() method to list everything that's inside a folder. Only bad thing is that it'll get all files, so you may get a problem to get "inside a file" when actually you want to get inside all folder.
The following code loop through all subfolders, skip files, and print the name of all folders that are not empty.
for folder in os.listdir("."):
try:
if len( os.listdir("./"+folder) )>0:
print(
folder
)
except:
pass

-Python- Move All PDF Files in Folder to NewDirectory Based on Matching Names, Using Glob or Shutil

I'm trying to write code that will move hundreds of PDF files from a :/Scans folder into another directory based on the matching each client's name. I'm not sure if I should be using Glob, or Shutil, or a combination of both. My working theory is that Glob should work for such a program, as the glob module "finds all the pathnames matching a specified pattern," and then use Shutil to physically move the files?
Here is a breakdown of my file folders to give you a better idea of what I'm trying to do.
Within :/Scans folder I have thousands of PDF files, manually renamed based on client and content, such that the folder looks like this:
lastName, firstName - [contentVariable]
(repeat the above 100,000x)
Within the :/J drive of my computer I have a folder named 'Clients' with sub-folders for each and every client, similar to the pattern above, named as 'lastName, firstName'
I'm looking to have the program go through the :/Scans folder and move each PDF to the matching client folder based on 'lastName, firstName'
I've been able to write a simple program to move files between folders, but not one that will do the aforesaid name matching.
shutil.copy('C:/Users/Kenny/Documents/Scan_Drive','C:/Users/Kenny/Documents/Clients')
^ Moving a file from one folder to another.. quite easily done.
Is there a way to modify the above code to apply to a regex (below)?
shutil.copy('C:/Users/Kenny/Documents/Scan_Drive/\w*', 'C:/Users/Kenny/Documents/Clients/\w*')
EDIT: #Byberi - Something as such?
path = "C:/Users/Kenny/Documents/Scans"
dirs = os.path.isfile()
This would print all the files and directories
for file in dirs:
print file
dest_dir = "C:/Users/Kenny/Documents/Clients"
for file in glob.glob(r'C:/*'):
print(file)
shutil.copy(file, dest_dir)
I've consulted the following threads already, but I cannot seem to find how to match and move the files.
Select files in directory and move them based on text list of filenames
https://docs.python.org/3/library/glob.html
Python move files from directories that match given criteria to new directory
https://www.guru99.com/python-copy-file.html
https://docs.python.org/3/howto/regex.html
https://code.tutsplus.com/tutorials/file-and-directory-operations-using-python--cms-25817

Running code on multiple subdirectories

I have some code that I would like to run on multiple files, each contained in its own subdirectory. I'd like to write some additional code to ask the user for a subdirectory name, opens the subdirectory, and run the code on a file contained within it (there is only one file contained in each subdirectory). Can anyone help?

with this loop you can manipulate all the file through the subfolders for the root folder
import os
for root, dirs, files in os.walk('Your path here'):
for file in files:
//your code here//

Extract all audio files from a directory and put them to a new one | python

I have a folder with 1600 audio files inside which I want to extract them using the essentia extractor and changing them into a .json file in another folder in the same directory. To do this I use this line:
os.system("/usr/local/bin/essentia_streaming_extractor_music 2.mp3 2.mp3.json")
were 2.mp3 is the original file and 2 is the id of my audio file. As you can see I want to keep the name of my audio the same and just add the .json
extension. I don't know though how to keep the id of each file and what kind of iteration and recursive programming I need to do to make this happen. Can somebody help me?

import os
allfiles = os.listdir('.') # Lists all files in the current directory
for item in allfiles: # iterate over all files in the current directory
if item.endswith('.mp3'): # Checks if the file is a mp3 file
os.system('/usr/local/bin/essentia_streaming_extractor_music '+item+' '+item+'.json')