Import required modules

import os
import shutil

Set source path, destination path and collect folder names

destination = "your_destination_path"
source = "your_source_path"
folders = os.listdir(source)

Iterate over the folders

for folder in folders:
    file_path = os.path.join(source,folder)
    files = os.listdir(file_path)

    # Iterate over files in folders
    for file in files:
        src = os.path.join(file_path,file)
        # Move file to destination
        dest = shutil.move(src, destination)