AttributeError: module 'tensorflow' has no attribute 'placeholder' 

I have python 3.7.1 and tensorflow 2.0.0
I tried running your code but i get this error AttributeError: module 'tensorflow' has no attribute 'placeholder' 

I tried adding 
```
import tensorflow.compat.v1 as tf
tf.disable_v2_behavior() 
```
But it doesnt work either. 
Do you have any other suggestions? Or maybe on which versions of python and tensorflow this code works?