# 修改工作目錄
import os
os.chdir(r'C:\Users\Hider\Desktop')

# 定義函式
def list_all_files(rootdir):
    import os
    _files = []
    # 列出資料夾下所有的目錄與檔案
    list = os.listdir(rootdir)
    for i in range(0, len(list)):
        # 構造路徑
        path = os.path.join(rootdir, list[i])
        # 判斷路徑是否為檔案目錄或者檔案
        # 如果是目錄則繼續遞迴
        
 
if os.path.isdir(path):
            _files.extend(list_all_files(path))
        if os.path.isfile(path):
            _files.append(path)
    return _files

# 執行
dir = r'C:\Users\Hider\Desktop\python' # 目錄地址
list_all_files(dir)

# 結果
```
['C:\\Users\\Hider\\Desktop\\python\\dataminingguide.pdf',
 'C:\\Users\\Hider\\Desktop\\python\\kaggle-titanic-learning.py
 
',
 'C:\\Users\\Hider\\Desktop\\python\\nba.txt',
 'C:\\Users\\Hider\\Desktop\\python\\python-pandas-learning.py',
 'C:\\Users\\Hider\\Desktop\\python\\python_algorithm_learning.py',
 'C:\\Users\\Hider\\Desktop\\python\\Python程式設計：從入門到實踐.pdf',
 'C:\\Users\\Hider\\Desktop\\python\\《Python資料探勘入門與實踐》.pdf
 
',
 'C:\\Users\\Hider\\Desktop\\python\\大數定理.py',
 'C:\\Users\\Hider\\Desktop\\python\\技術學習.sql',
 'C:\\Users\\Hider\\Desktop\\python\\泰坦尼克\\gender_submission.csv',
 'C:\\Users\\Hider\\Desktop\\python\\泰坦尼克\\test.csv',
 'C:\\Users\\Hider\\Desktop\\python\\泰坦尼克\\titanic.zip',
 'C:\\Users\\Hider\\Desktop\\python\\鮑魚\\abalone.csv',
 'C:\\Users\\Hider\\Desktop\\python\\鮑魚\\abalone.data',
 'C:\\Users\\Hider\\Desktop\\python\\鮑魚\\abalone.names',
 'C:\\Users\\Hider\\Desktop\\python\\鮑魚\\abalone.txt',
 'C:\\Users\\Hider\\Desktop\\python\\鮑魚\\dim_sex.xlsx',
 'C:\\Users\\Hider\\Desktop\\python\\鮑魚\\鮑魚資料集.md']

```