`tensorflow.keras.backend` import breaks `pytype`

[lgeiger]

When linting the following code with [email protected] adding a from tensorflow.keras import backend import breaks linting.

The following code breaks:

import tensorflow as tf
from tensorflow.keras import backend  # This line breaks linting in line 4

print(tf.keras.models.Sequential())

File "tf_imports.py", line 4, in <module>: No attribute 'models' on module 'tensorflow.keras' [module-attr]

However the removing line 2 seems to make pytype happy again:

import tensorflow as tf

print(tf.keras.models.Sequential())

I tested this with Tensorflow v2.5.0 and v2.6.0.