mac上安装Tensorflow, python 3 遇到AttributeError: module 'tensorflow' has no attribute 'constant'

mac上安装Tensorflow, python 3 遇到AttributeError: module ‘tensorflow’ has no attribute ‘constant’， 查找了很多资料发现还是不对，最后找到
https://qiita.com/tom_ato/items/bbdf4574b3ecb0048fa1

解决了问题，如果你之前已经安装过tensorflow, python3, 先不需要按照上面的steps来操作，可以直接执行如下命令：

$ sudo easy_install pip
$ sudo easy_install --upgrade six
$ sudo pip install --upgrade pip
$ pip3 install --upgrade tensorflow

看能不能解决你的问题，如果不能解决，你再按照上面链接中的steps来操作，
最后通过如下代码验证：

$ python
>>> import tensorflow as tf
>>> hello = tf.constant('Hello, TensorFlow!')
>>> sess = tf.Session()
>>> print(sess.run(hello))

如果正常输出：“Hello, TensorFlow!” 说明安装TensorFlow成功！
如果出现下面错误：

2019-03-20 17:34:06.194714: I tensorflow/core/platform/cpu_feature_guard.cc:141] Your CPU supports instructions that this TensorFlow binary was not compiled to use: AVX2 FMA

说明你的CPU的不符合要求，可以暂时不用care, 依然继续执行命令，输出“Hello, TensorFlow!”依然能够成功！

MacBook-Pro:~ Vino$ python3
Python 3.7.1 (default, Dec 14 2018, 13:28:58) 
[Clang 4.0.1 (tags/RELEASE_401/final)] :: Anaconda, Inc. on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import tensorflow as tf
>>> hello = tf.constant('Hello, TensorFlow!')
>>> sess = tf.Session()
2019-03-20 17:34:06.194714: I tensorflow/core/platform/cpu_feature_guard.cc:141] Your CPU supports instructions that this TensorFlow binary was not compiled to use: AVX2 FMA
>>> print(sess.run(hello))
b'Hello, TensorFlow!'
>>> 

如果想解决上面的问题，可以参照：
https://stackoverflow.com/questions/47068709/your-cpu-supports-instructions-that-this-tensorflow-binary-was-not-compiled-to-u

我试了以下命令：

pip install --ignore-installed --upgrade "Download URL"

Download URL 替换成你的下载的URL，从下面链接中找到符合你系统要求的：
https://github.com/lakshayg/tensorflow-build