Tensorflow 打印常量hello tensorflow

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打印常量hello tensorflow

import tensorflow as tf
tf.__version__
'2.4.0'

# 定义常量
hello_tf_constant = tf.constant("hello,tensorflow")

# 版本不兼容，无法直接运行
with tf.Session() as sess:
 sess.run(hello_tf_constant)
---------------------------------------------------------------------------
AttributeError Traceback (most recent call last)
 ipython-input-3-4eb9d4d3287a in module 
---- 1 with tf.Session() as sess:
 2 sess.run(hello_tf_constant)
AttributeError: module 'tensorflow' has no attribute 'Session' 

with tf.compat.v1.Session() as sess:
 sess.run(hello_tf_constant)
---------------------------------------------------------------------------
RuntimeError Traceback (most recent call last)
 ipython-input-4-420f364e899d in module 
 1 with tf.compat.v1.Session() as sess:
---- 2 sess.run(hello_tf_constant)
/opt/conda/lib/python3.6/site-packages/tensorflow/python/client/session.py in run(self, fetches, feed_dict, options, run_metadata)
 966 try:
 967 result = self._run(None, fetches, feed_dict, options_ptr,
-- 968 run_metadata_ptr)
 969 if run_metadata:
 970 proto_data = tf_session.TF_GetBuffer(run_metadata_ptr)
/opt/conda/lib/python3.6/site-packages/tensorflow/python/client/session.py in _run(self, handle, fetches, feed_dict, options, run_metadata)
 1114 raise RuntimeError('Attempted to use a closed Session.')
 1115 if self.graph.version == 0:
- 1116 raise RuntimeError('The Session graph is empty. Add operations to the '
 1117 'graph before calling run().')
 1118 
RuntimeError: The Session graph is empty. Add operations to the graph before calling run(). 

tf.compat.v1.disable_eager_execution()
with tf.compat.v1.Session() as sess:
 sess.run(hello_tf_constant)
---------------------------------------------------------------------------
RuntimeError Traceback (most recent call last)
 ipython-input-5-95efe77ef2e2 in module 
 1 tf.compat.v1.disable_eager_execution()
 2 with tf.compat.v1.Session() as sess:
---- 3 sess.run(hello_tf_constant)
/opt/conda/lib/python3.6/site-packages/tensorflow/python/client/session.py in run(self, fetches, feed_dict, options, run_metadata)
 966 try:
 967 result = self._run(None, fetches, feed_dict, options_ptr,
-- 968 run_metadata_ptr)
 969 if run_metadata:
 970 proto_data = tf_session.TF_GetBuffer(run_metadata_ptr)
/opt/conda/lib/python3.6/site-packages/tensorflow/python/client/session.py in _run(self, handle, fetches, feed_dict, options, run_metadata)
 1114 raise RuntimeError('Attempted to use a closed Session.')
 1115 if self.graph.version == 0:
- 1116 raise RuntimeError('The Session graph is empty. Add operations to the '
 1117 'graph before calling run().')
 1118 
RuntimeError: The Session graph is empty. Add operations to the graph before calling run().

tf.compat.v1.disable_eager_execution()
hello_tf_constant = tf.constant("hello,tensorflow")
with tf.compat.v1.Session() as sess:
 print(sess.run(hello_tf_constant))
b'hello,tensorflow'

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参考链接RuntimeError: The Session graph is empty. Add operations to the graph before calling run().解决方法AttributeError: module 'tensorflow' has no attribute 'Session'错误解决tensorflow 无法执行sess =tf .Session ()

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