conda create --name tensorflow36 python=3.6
conda activate tensorflow36
conda list
conda search tensorflow
pip install tensorflow==2.1.0
conda install tensorflow==2.1.0
>>> import tensorflow as tf
>>> tf.compat.v1.disable_eager_execution()
>>> sess=tf.compat.v1.Session()
>>> hello=tf.constant('hello')
>>> print(sess.run(hello))