Batch Copy Specific Files in Nested Folders Using Python

Introduction

The author encountered a request to copy specific files (e.g., those containing "需求单") from a folder and all its subfolders, which would be tedious to do manually when dealing with hundreds of directories.

Requirement Clarification

The goal is to automate the process with Python, copying every file whose name includes the target keyword into a designated output folder.

Implementation

The solution iterates through the directory tree using os.walk, checks each filename for the keyword, and copies matching files with shutil.copyfile. The core script is shown below:

import shutil
import os

def copy_file(path):
    # (root, dirs, files) represent the current directory, its subdirectories, and files
    for root, dirs, files in os.walk(path):
        for file in files:
            if "需求单" in file:
                shutil.copyfile(root + '\\' + file, target_path + '\\' + file)
                print(root + '\\' + file + ' 复制成功-> ' + target_path)
        for dir_in in dirs:
            copy_file(dir_in)

if __name__ == '__main__':
    # Folder to search
    source_path = r'C:\Users\pdcfi\Desktop\test\需求单'
    # Destination folder
    target_path = r'C:\Users\pdcfi\Desktop\test\res'
    copy_file(source_path)

Running this script copies all matching files from the source directory and its subdirectories to the target directory, eliminating the need for manual copying.

Conclusion

The example showcases a practical Python automation case for file handling that can be adapted to various real‑world tasks.