AttributeError: module 'tensorflow' has no attribute 'Session'
According to TF 1:1 Symbols Map, in TF 2.0 you should use tf.compat.v1.Session() instead of tf.Session()
https://docs.google.com/spreadsheets/d/1FLFJLzg7WNP6JHODX5q8BDgptKafq_slHpnHVbJIteQ/edit#gid=0
To get TF 1.x like behaviour in TF 2.0 one can run
import tensorflow.compat.v1 as tf
tf.disable_v2_behavior()