How to Downgrade Python Version
Recently, I learned that TensorFlow runs only on Python 3.4, 3.5, or 3.6 for Python3 version. If you download Anaconda 5.3.1, it will install Python version 3.7. Therefore, you have to downgrade your Python version. In Windows, you can do do the following:
First, you have to check the availability of all downloadable Python versions:
conda search python
This will give you such results:
# Name Version Build Channel
python 2.6.8 5 pkgs/free
python 2.6.8 6 pkgs/free
python 2.6.9 0 pkgs/free
python 2.6.9 1 pkgs/free
python 2.7.3 2 pkgs/free
python 2.7.3 3 pkgs/free
python 2.7.3 4 pkgs/free
python 2.7.3 5 pkgs/free
python 2.7.3 6 pkgs/free
python 2.7.3 7 pkgs/free
python 2.7.4 0 pkgs/free
python 2.7.5 0 pkgs/free
python 2.7.5 1 pkgs/free
python 2.7.5 2 pkgs/free
python 2.7.6 0 pkgs/free
python 2.7.6 2 pkgs/free
python 2.7.7 0 pkgs/free
python 2.7.7 1 pkgs/free
python 2.7.7 2 pkgs/free
python 2.7.8 0 pkgs/free
python 2.7.9 0 pkgs/free
python 2.7.9 1 pkgs/free
python 2.7.10 0 pkgs/free
python 2.7.10 1 pkgs/free
python 2.7.10 3 pkgs/free
python 2.7.10 4 pkgs/free
python 2.7.10 5 pkgs/free
python 2.7.11 0 pkgs/free
python 2.7.11 1 pkgs/free
python 2.7.11 2 pkgs/free
python 2.7.11 4 pkgs/free
python 2.7.11 5 pkgs/free
python 2.7.12 0 pkgs/free
python 2.7.13 0 pkgs/free
python 2.7.13 1 pkgs/free
python 2.7.13 h1b6d89f_16 pkgs/main
python 2.7.13 h9912b81_15 pkgs/main
python 2.7.13 hb034564_12 pkgs/main
python 2.7.14 h2765ee6_18 pkgs/main
python 2.7.14 h3e68818_15 pkgs/main
python 2.7.14 h4084c39_22 pkgs/main
python 2.7.14 h4a10d90_30 pkgs/main
python 2.7.14 h4a10d90_31 pkgs/main
python 2.7.14 h59f5a59_20 pkgs/main
python 2.7.14 h819644d_16 pkgs/main
python 2.7.14 h8c3f1cb_23 pkgs/main
python 2.7.15 h2880e7c_2 pkgs/main
python 2.7.15 h2880e7c_3 pkgs/main
python 2.7.15 h2880e7c_4 pkgs/main
python 2.7.15 hcb6e200_5 pkgs/main
python 2.7.15 he216670_0 pkgs/main
python 3.3.0 4 pkgs/free
python 3.3.1 0 pkgs/free
python 3.3.2 0 pkgs/free
python 3.3.3 0 pkgs/free
python 3.3.4 0 pkgs/free
python 3.3.5 0 pkgs/free
python 3.3.5 1 pkgs/free
python 3.3.5 2 pkgs/free
python 3.4.0 0 pkgs/free
python 3.4.1 0 pkgs/free
python 3.4.1 1 pkgs/free
python 3.4.1 2 pkgs/free
python 3.4.2 0 pkgs/free
python 3.4.2 1 pkgs/free
python 3.4.3 0 pkgs/free
python 3.4.3 3 pkgs/free
python 3.4.3 4 pkgs/free
python 3.4.3 5 pkgs/free
python 3.4.4 0 pkgs/free
python 3.4.4 1 pkgs/free
python 3.4.4 2 pkgs/free
python 3.4.4 4 pkgs/free
python 3.4.4 5 pkgs/free
python 3.4.5 0 pkgs/free
python 3.5.0 0 pkgs/free
python 3.5.0 1 pkgs/free
python 3.5.0 2 pkgs/free
python 3.5.0 3 pkgs/free
python 3.5.0 4 pkgs/free
python 3.5.1 0 pkgs/free
python 3.5.1 1 pkgs/free
python 3.5.1 2 pkgs/free
python 3.5.1 4 pkgs/free
python 3.5.1 5 pkgs/free
python 3.5.2 0 pkgs/free
python 3.5.3 0 pkgs/free
python 3.5.3 2 pkgs/free
python 3.5.3 3 pkgs/free
python 3.5.4 0 pkgs/free
python 3.5.4 h1357f44_23 pkgs/main
python 3.5.4 hc495aa9_21 pkgs/main
python 3.5.4 hd3c4935_11 pkgs/main
python 3.5.4 hdec4e59_20 pkgs/main
python 3.5.4 hedc2606_15 pkgs/main
python 3.5.5 h0c2934d_0 pkgs/main
python 3.5.5 h0c2934d_1 pkgs/main
python 3.5.5 h0c2934d_2 pkgs/main
python 3.5.6 he025d50_0 pkgs/main
python 3.6.0 0 pkgs/free
python 3.6.1 0 pkgs/free
python 3.6.1 2 pkgs/free
python 3.6.2 0 pkgs/free
python 3.6.2 h09676a0_15 pkgs/main
python 3.6.2 h6679aeb_11 pkgs/main
python 3.6.3 h210ce5f_2 pkgs/main
python 3.6.3 h3389d20_0 pkgs/main
python 3.6.3 h3b118a2_4 pkgs/main
python 3.6.3 h9e2ca53_1 pkgs/main
python 3.6.4 h0c2934d_2 pkgs/main
python 3.6.4 h0c2934d_3 pkgs/main
python 3.6.4 h6538335_0 pkgs/main
python 3.6.4 h6538335_1 pkgs/main
python 3.6.5 h0c2934d_0 pkgs/main
python 3.6.6 hea74fb7_0 pkgs/main
python 3.6.7 h33f27b4_0 pkgs/main
python 3.6.7 h33f27b4_1 pkgs/main
python 3.6.7 h9f7ef89_2 pkgs/main
python 3.7.0 hea74fb7_0 pkgs/main
python 3.7.1 h33f27b4_3 pkgs/main
python 3.7.1 h33f27b4_4 pkgs/main
python 3.7.1 h8c8aaf0_6 pkgs/main
python 3.7.1 he44a216_5 pkgs/main
Finally, downgrading can be easily done by executing this command:
conda install python=3.6.7
Nope, you’re not done. Please check if you numpy is working. If it gives you ImportError multiarray, you have to delete the numpy (most likely manually) and reinstall numpy with pip.
P.S. If you install Python 3.5, you have to install scipy separately.
