Last month, the Tensorflow team at Google announced official support for Raspberry Pi, by releasing pre-build binaries of v1.9.0 to piwheels.org. Since then, two new releases (v1.10.1 and v1.11.0) have been made and they are now available on piwheels.org.
To install the latest Tensorflow on Raspbian Stretch, first install libatlas, which is a depencency for the optimised version of numpy on piwheels, the simply use pip to install tensorflow:
sudo apt install libatlas3-base sudo pip3 install tensorflow
If you’re using Tensorflow in your Pi project, be sure to let us know by tweeting at @piwheels.