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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.

Traceback (most recent call last)

File "C:\ProgramData\Miniconda3\lib\site-packages\flask\app.py", line 2095, in `call`

    def __call__(self, environ: dict, start_response: t.Callable) -> t.Any:

        """The WSGI server calls the Flask application object as the

        WSGI application. This calls :meth:`wsgi_app`, which can be

        wrapped to apply middleware.

"""

        return self.wsgi_app(environ, start_response)

File "C:\ProgramData\Miniconda3\lib\site-packages\flask\app.py", line 2080, in `wsgi_app`

            try:

                ctx.push()

                response = self.full_dispatch_request()

            except Exception as e:

                error = e

                response = self.handle_exception(e)

            except:  # noqa: B001

                error = sys.exc_info()[1]

                raise

            return response(environ, start_response)

        finally:

File "C:\ProgramData\Miniconda3\lib\site-packages\flask\app.py", line 2077, in `wsgi_app`

        ctx = self.request_context(environ)

        error: t.Optional[BaseException] = None

        try:

            try:

                ctx.push()

                response = self.full_dispatch_request()

            except Exception as e:

                error = e

                response = self.handle_exception(e)

            except:  # noqa: B001

                error = sys.exc_info()[1]

File "C:\ProgramData\Miniconda3\lib\site-packages\flask\app.py", line 1526, in `full_dispatch_request`

            rv = self.preprocess_request()

            if rv is None:

                rv = self.dispatch_request()

        except Exception as e:

            rv = self.handle_user_exception(e)

        return self.finalize_request(rv)

    def finalize_request(

        self,

        rv: t.Union[ResponseReturnValue, HTTPException],

        from_error_handler: bool = False,

File "C:\ProgramData\Miniconda3\lib\site-packages\flask\app.py", line 1545, in `finalize_request`

        with the `from_error_handler` flag.  If enabled, failures in

        response processing will be logged and otherwise ignored.

        :internal:

"""

        response = self.make_response(rv)

        try:

            response = self.process_response(response)

            request_finished.send(self, response=response)

        except Exception:

            if not from_error_handler:

File "C:\ProgramData\Miniconda3\lib\site-packages\flask\app.py", line 1734, in `make_response`

                        " response. The return type must be a string,"

                        " dict, tuple, Response instance, or WSGI"

                        f" callable, but it was a {type(rv).__name__}."

                    ).with_traceback(sys.exc_info()[2]) from None

            else:

                raise TypeError(

                    "The view function did not return a valid"

                    " response. The return type must be a string,"

                    " dict, tuple, Response instance, or WSGI"

                    f" callable, but it was a {type(rv).__name__}."

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.

This is the Copy/Paste friendly version of the traceback.

Traceback (most recent call last):
  File "C:\ProgramData\Miniconda3\lib\site-packages\flask\app.py", line 2095, in __call__
    return self.wsgi_app(environ, start_response)
  File "C:\ProgramData\Miniconda3\lib\site-packages\flask\app.py", line 2080, in wsgi_app
    response = self.handle_exception(e)
  File "C:\ProgramData\Miniconda3\lib\site-packages\flask\app.py", line 2077, in wsgi_app
    response = self.full_dispatch_request()
  File "C:\ProgramData\Miniconda3\lib\site-packages\flask\app.py", line 1526, in full_dispatch_request
    return self.finalize_request(rv)
  File "C:\ProgramData\Miniconda3\lib\site-packages\flask\app.py", line 1545, in finalize_request
    response = self.make_response(rv)
  File "C:\ProgramData\Miniconda3\lib\site-packages\flask\app.py", line 1734, in make_response
    raise TypeError(
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 debugger caught an exception in your WSGI application. You can now look at the traceback which led to the error. If you enable JavaScript you can also use additional features such as code execution (if the evalex feature is enabled), automatic pasting of the exceptions and much more.

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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. // Werkzeug Debugger

TypeError

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.

Traceback (most recent call last)

File "C:\ProgramData\Miniconda3\lib\site-packages\flask\app.py", line 2095, in `call`

    def __call__(self, environ: dict, start_response: t.Callable) -> t.Any:

        """The WSGI server calls the Flask application object as the

        WSGI application. This calls :meth:`wsgi_app`, which can be

        wrapped to apply middleware.

"""

        return self.wsgi_app(environ, start_response)

File "C:\ProgramData\Miniconda3\lib\site-packages\flask\app.py", line 2080, in `wsgi_app`

            try:

                ctx.push()

                response = self.full_dispatch_request()

            except Exception as e:

                error = e

                response = self.handle_exception(e)

            except:  # noqa: B001

                error = sys.exc_info()[1]

                raise

            return response(environ, start_response)

        finally:

File "C:\ProgramData\Miniconda3\lib\site-packages\flask\app.py", line 2077, in `wsgi_app`

        ctx = self.request_context(environ)

        error: t.Optional[BaseException] = None

        try:

            try:

                ctx.push()

                response = self.full_dispatch_request()

            except Exception as e:

                error = e

                response = self.handle_exception(e)

            except:  # noqa: B001

                error = sys.exc_info()[1]

File "C:\ProgramData\Miniconda3\lib\site-packages\flask\app.py", line 1526, in `full_dispatch_request`

            rv = self.preprocess_request()

            if rv is None:

                rv = self.dispatch_request()

        except Exception as e:

            rv = self.handle_user_exception(e)

        return self.finalize_request(rv)

    def finalize_request(

        self,

        rv: t.Union[ResponseReturnValue, HTTPException],

        from_error_handler: bool = False,

File "C:\ProgramData\Miniconda3\lib\site-packages\flask\app.py", line 1545, in `finalize_request`

        with the `from_error_handler` flag.  If enabled, failures in

        response processing will be logged and otherwise ignored.

        :internal:

"""

        response = self.make_response(rv)

        try:

            response = self.process_response(response)

            request_finished.send(self, response=response)

        except Exception:

            if not from_error_handler:

File "C:\ProgramData\Miniconda3\lib\site-packages\flask\app.py", line 1734, in `make_response`

                        " response. The return type must be a string,"

                        " dict, tuple, Response instance, or WSGI"

                        f" callable, but it was a {type(rv).__name__}."

                    ).with_traceback(sys.exc_info()[2]) from None

            else:

                raise TypeError(

                    "The view function did not return a valid"

                    " response. The return type must be a string,"

                    " dict, tuple, Response instance, or WSGI"

                    f" callable, but it was a {type(rv).__name__}."

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.

This is the Copy/Paste friendly version of the traceback.

Traceback (most recent call last):
  File "C:\ProgramData\Miniconda3\lib\site-packages\flask\app.py", line 2095, in __call__
    return self.wsgi_app(environ, start_response)
  File "C:\ProgramData\Miniconda3\lib\site-packages\flask\app.py", line 2080, in wsgi_app
    response = self.handle_exception(e)
  File "C:\ProgramData\Miniconda3\lib\site-packages\flask\app.py", line 2077, in wsgi_app
    response = self.full_dispatch_request()
  File "C:\ProgramData\Miniconda3\lib\site-packages\flask\app.py", line 1526, in full_dispatch_request
    return self.finalize_request(rv)
  File "C:\ProgramData\Miniconda3\lib\site-packages\flask\app.py", line 1545, in finalize_request
    response = self.make_response(rv)
  File "C:\ProgramData\Miniconda3\lib\site-packages\flask\app.py", line 1734, in make_response
    raise TypeError(
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 debugger caught an exception in your WSGI application. You can now look at the traceback which led to the error. If you enable JavaScript you can also use additional features such as code execution (if the evalex feature is enabled), automatic pasting of the exceptions and much more.

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TypeError

Traceback (most recent call last)

File "C:\ProgramData\Miniconda3\lib\site-packages\flask\app.py", line 2095, in __call__

File "C:\ProgramData\Miniconda3\lib\site-packages\flask\app.py", line 2080, in wsgi_app

File "C:\ProgramData\Miniconda3\lib\site-packages\flask\app.py", line 2077, in wsgi_app

File "C:\ProgramData\Miniconda3\lib\site-packages\flask\app.py", line 1526, in full_dispatch_request

File "C:\ProgramData\Miniconda3\lib\site-packages\flask\app.py", line 1545, in finalize_request

File "C:\ProgramData\Miniconda3\lib\site-packages\flask\app.py", line 1734, in make_response

Console Locked

File "C:\ProgramData\Miniconda3\lib\site-packages\flask\app.py", line 2095, in `call`

File "C:\ProgramData\Miniconda3\lib\site-packages\flask\app.py", line 2080, in `wsgi_app`

File "C:\ProgramData\Miniconda3\lib\site-packages\flask\app.py", line 2077, in `wsgi_app`

File "C:\ProgramData\Miniconda3\lib\site-packages\flask\app.py", line 1526, in `full_dispatch_request`

File "C:\ProgramData\Miniconda3\lib\site-packages\flask\app.py", line 1545, in `finalize_request`

File "C:\ProgramData\Miniconda3\lib\site-packages\flask\app.py", line 1734, in `make_response`