Flask view raises TypeError: 'bool' object is not callable

Question

I am trying to debug a view in my Flask app that is return a 500 status with the error TypeError: \'bool\' object is not callable in the traceback. The view cal

Answer 1

In Flask, a view must return one of the following:

• a string
• a Response object (or subclass)
• a tuple of (string, status, headers) or (string, status)
• a valid WSGI application

Flask tests for the first 3 options, and if they don't fit, assumes it is the fourth. You returned True somewhere, and it is being treated as a WSGI application instead.

See About Responses in the documentation.