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[Solved] Flask TypeError : The view function did not return a valid response. The function either returned None or ended without a return statement

Hello Guys, How are you all? Hope You all Are Fine. Today I get the following error Flask TypeError : The view function did not return a valid response. The function either returned None or ended without a return statement in python. So Here I am Explain to you all the possible solutions here.

Without wasting your time, Let’s start This Article to Solve This Error.

How Flask TypeError : The view function did not return a valid response. The function either returned None or ended without a return statement Error Occurs?

Today I get the following error Flask TypeError : The view function did not return a valid response. The function either returned None or ended without a return statement in python.

How To Solve Flask TypeError : The view function did not return a valid response. The function either returned None or ended without a return statement Error ?

  1. How To Solve Flask TypeError : The view function did not return a valid response. The function either returned None or ended without a return statement Error ?

    To Solve Flask TypeError : The view function did not return a valid response. The function either returned None or ended without a return statement Error The problem here is that one of your functions returns None and not that a return statement is missing, as observed in the error shown in your question.

  2. Flask TypeError : The view function did not return a valid response. The function either returned None or ended without a return statement

    To Solve Flask TypeError : The view function did not return a valid response. The function either returned None or ended without a return statement Error The problem here is that one of your functions returns None and not that a return statement is missing, as observed in the error shown in your question.

Solution 1

The problem here is that one of your functions returns None and not that a return statement is missing, as observed in the error shown in your question.

In order to provide more detailed help you’d need to provide a Minimal, Complete and Verifiable example.

Some of your calculations are returning a None value and you are trying to pass that value as a return value.

Here’s an example of a function returning None:

def lyrics():
    pass
a = lyrics()
print (a)

Output:

None

Specifically I also see in your code:

model = None
nlp = None

What I would suggest, for further debugging, is using Flask’s logging facility in order to print in the console the values of the variables that you are using for manipulation in order to track down the error.

Here’s the relevant documentation about how to use logging in Flask.

Summery

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