want to build a django server on ubuntu. Then run a test file after installing uwsgi, according to the online tutorials, and test.py, then reports an error. 
 error content: 
 dh@ubuntu:~$ uwsgi-- http: 8001-- wsgi-file test.py 
   Starting uWSGI 2.0.17 (64bit) on [Mon Jun 11 12:37:29 2018]   
 compiled with version: 7.3.0 on 07 June 2018 06:45:48 
 os: Linux-4.15.0-22-generic-sharp24-Ubuntu SMP Wed May 16 12:15:17 UTC 2018 
 nodename: ubuntu 
 machine: x8634 
 clock source: unix 
 detected number of CPU cores: 4 
 current working directory: / home/dh 
 detected binary Path: / home/dh/.local/bin/uwsgi 
! No internal routing support, rebuild with pcre support! 
   WARNING: you are running uWSGI without its master process manager   
 your processes number limit is 15072 
 your memory page size is 4096 bytes 
 detected max file descriptor number: 1024 
 lock engine: pthread robust mutexes 
 thunder lock: disabled (you can enable it with-- thunder-lock) 
 uWSGI http bound on: 8001 fd 4 
 spawned uWSGI http 1 (pid: 18207) 
 uwsgi socket 0 bound to TCP address 127.0.1 purge 36073 (port auto-assigned) fd 3 
 Python version: 3.6.5 (default, Apr 1 2018, 05:46:30) [GCC 7.3.0] 
   Python threads support is disabled. You can enable it with-- enable-threads   
 Python main interpreter initialized at 0x55e5bf3e29c0 
 your server socket listen backlog is limited to 100 connections 
 your mercy for graceful operations on workers is 60 seconds 
 mapped 72904 bytes (71 KB) for 1 cores 
   Operational MODE: single process   
 failed to open python file test.py 
 unable to load app 0 (mountpoint="") (callable not found or import error) 
   no app loaded.) Going in full dynamic mode   
   uWSGI is running in multiple interpreter mode   
 spawned uWSGI worker 1 (and the only) (pid: 18206, cores: 1) 
 ask for help! 
