![Solved][Flask1.1] TypeError: The view function did not return a valid response. The return type must be a string, dict, tuple, Response instance, or WSGI callable, but it was a list. Solved][Flask1.1] TypeError: The view function did not return a valid response. The return type must be a string, dict, tuple, Response instance, or WSGI callable, but it was a list.](https://blog.kakaocdn.net/dn/bhLFr5/btqGxxcJt7l/5pQd3ixkPGx7qZAlf0cuCk/img.png)
Solved][Flask1.1] TypeError: The view function did not return a valid response. The return type must be a string, dict, tuple, Response instance, or WSGI callable, but it was a list.
The view function did not return a valid response. The return type must be a string, tuple, Response instance, or WSGI callable, but it was a generator. · Issue #55 · miguelgrinberg/flask-video-streaming ·
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BUG] - TypeError: The view function did not return a valid response. The return type must be a string, dict, tuple, Response instance, or WSGI callable, but it was a coroutine. ·
![TypeError: The view function did not return a valid response. The function either returned None 的解决_typeerror: the view function for 'index' did not r_鹅鹅鹅鹅鹅鹅鹅鹅鹅鹅鹅鹅的博客-CSDN博客 TypeError: The view function did not return a valid response. The function either returned None 的解决_typeerror: the view function for 'index' did not r_鹅鹅鹅鹅鹅鹅鹅鹅鹅鹅鹅鹅的博客-CSDN博客](https://img-blog.csdnimg.cn/b40db819b71344f397ab45e17a549723.png?x-oss-process=image/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBA6bmF6bmF6bmF6bmF6bmF6bmF6bmF6bmF6bmF6bmF6bmF6bmF,size_20,color_FFFFFF,t_70,g_se,x_16)
TypeError: The view function did not return a valid response. The function either returned None 的解决_typeerror: the view function for 'index' did not r_鹅鹅鹅鹅鹅鹅鹅鹅鹅鹅鹅鹅的博客-CSDN博客
![Flask Delicious Tutorial : Building a Library Management System Part 4 - Focus on Responses - DEV Community Flask Delicious Tutorial : Building a Library Management System Part 4 - Focus on Responses - DEV Community](https://res.cloudinary.com/practicaldev/image/fetch/s--RS3THOPS--/c_imagga_scale,f_auto,fl_progressive,h_900,q_auto,w_1600/https://dev-to-uploads.s3.amazonaws.com/i/up9w1wvic4czas335pzr.png)
Flask Delicious Tutorial : Building a Library Management System Part 4 - Focus on Responses - DEV Community
![TypeError: The view function did not return a valid response. The function either returned None or ended without a return statement. | Bugshare TypeError: The view function did not return a valid response. The function either returned None or ended without a return statement. | Bugshare](https://res.cloudinary.com/bugshare/image/upload/v1616736185/production/user_avatars/651bde76-910e-4157-953b-cd0f7245d274.png)
TypeError: The view function did not return a valid response. The function either returned None or ended without a return statement. | Bugshare
![Solved][Flask1.1] TypeError: The view function did not return a valid response. The return type must be a string, dict, tuple, Response instance, or WSGI callable, but it was a list. Solved][Flask1.1] TypeError: The view function did not return a valid response. The return type must be a string, dict, tuple, Response instance, or WSGI callable, but it was a list.](https://img1.daumcdn.net/thumb/C176x176/?fname=https://blog.kakaocdn.net/dn/bYkJW5/btqETJ7OlOj/ergkIxz88SjWsDIIYuldnk/img.png)
Solved][Flask1.1] TypeError: The view function did not return a valid response. The return type must be a string, dict, tuple, Response instance, or WSGI callable, but it was a list.
🐞 TypeError: The view function for 'main' did not return a valid response. · Issue #137 · rycus86/prometheus_flask_exporter · GitHub
![python - Don't understand why a function accessing an API is not returning a response - CS50 Stack Exchange python - Don't understand why a function accessing an API is not returning a response - CS50 Stack Exchange](https://i.stack.imgur.com/Ss8Q0.png)