django显示媒体文件 django实现后台显示媒体文件

```
MEDIA_URL = '/media/'
MEDIA_ROOT = os.path.join(BASE_DIR, 'media')

urlpatterns = [

 url(r'^media/(?P<path>.*)$', serve, {"document_root": MEDIA_ROOT}),

]

Traceback (most recent call last):
 File "C:\Users\user\Desktop\untitled1\venv\Scripts\pyinstaller-script.py", line 11, in <module>
 load_entry_point('PyInstaller==3.4', 'console_scripts', 'pyinstaller')()
 File "C:\Users\user\Desktop\untitled1\venv\lib\site-packages\PyInstaller\__main__.py", line 111, in run
 run_build(pyi_config, spec_file, **vars(args))
 File "C:\Users\user\Desktop\untitled1\venv\lib\site-packages\PyInstaller\__main__.py", line 63, in run_build
 PyInstaller.building.build_main.main(pyi_config, spec_file, **kwargs)
 File "C:\Users\user\Desktop\untitled1\venv\lib\site- packages\PyInstaller\building\build_main.py", line 838, in main
 build(specfile, kw.get('distpath'), kw.get('workpath'), kw.get('clean_build')) 
 File "C:\Users\user\Desktop\untitled1\venv\lib\site- packages\PyInstaller\building\build_main.py", line 784, in build
 exec(text, spec_namespace)
 File "<string>", line 29, in <module> 
 File "C:\Users\user\Desktop\untitled1\venv\lib\site-packages\PyInstaller\building\api.py", line 424, in __init__
 strip_binaries=self.strip, upx_binaries=self.upx, 
 File "C:\Users\user\Desktop\untitled1\venv\lib\site-packages\PyInstaller\building\api.py", line 196, in __init__
 self.__postinit__()
 File "C:\Users\user\Desktop\untitled1\venv\lib\site-packages\PyInstaller\building\datastruct.py", line 158, in __postinit__
 self.assemble() 
 File "C:\Users\user\Desktop\untitled1\venv\lib\site-packages\PyInstaller\building\api.py", line 273, in assemble
 pylib_name = os.path.basename(bindepend.get_python_library_path()) 
 File "C:\Users\user\AppData\Local\Programs\Python\Python37\lib\ntpath.py", line 214, in basename
 return split(p)[1]
 File "C:\Users\user\AppData\Local\Programs\Python\Python37\lib\ntpath.py", line 183, in split
 p = os.fspath(p) TypeError: expected str, bytes or os.PathLike object, not NoneType