AttributeError: 'module' object (scipy) has no attribute *** Why does this error occur?

Most possibly because scipy is a library (package) that contains modules and to import a specific module from the scipy library, you need to specify it and import the module itself. As it's a separate module (sub-package), once you import it, it's attributes are available to you by using the regular scipy.module.attribute

In order to fix the error, add the following line at the top of your script

from scipy import integrate