Update Python guide to install via Debian package to avoid future issues when...

Update Python guide to install via Debian package to avoid future issues when trying to use Coral libraries. (Debian package installs are incompatible with pip installs.)

PiperOrigin-RevId: 358414526
Change-Id: I769d7e178e490fe9d86abe3194e9bfa8778350f6

tensorflow/lite/g3doc/guide/python.md

@@ -29,29 +29,35 @@ Note: If you need access to other Python APIs, such as the
 
 ## Install TensorFlow Lite for Python
 
-To install the TensorFlow Lite runtime package, run this command:
-
-<pre class="devsite-terminal devsite-click-to-copy">
-pip3 install --extra-index-url https://google-coral.github.io/py-repo/ tflite_runtime
+If you're running Debian Linux or a derivative of Debian (including Raspberry Pi
+OS), you should install from our Debian package repo. This requires that you add
+a new repo list and key to your system and then install as follows:
+
+<pre class="devsite-terminal">
+echo "deb https://packages.cloud.google.com/apt coral-edgetpu-stable main" | sudo tee /etc/apt/sources.list.d/coral-edgetpu.list
+<code class="devsite-terminal"
+>curl https://packages.cloud.google.com/apt/doc/apt-key.gpg | sudo apt-key add -
+</code><code class="devsite-terminal"
+>sudo apt-get update
+</code><code class="devsite-terminal"
+>sudo apt-get install python3-tflite-runtime</code>
 </pre>
 
-If you're on a Raspberry Pi, this command might fail due to a known issue with
-the `extra-index-url` option
-([#4011](https://github.com/raspberrypi/linux/issues/4011)). So we suggest you
-specify one of the
-[`tflite_runtime` wheels](https://github.com/google-coral/pycoral/releases/)
-that matches your system. For example, if you're running Raspberry Pi OS 10
-(which has Python 3.7), instead use this command:
+For all other systems, you can install with pip:
 
 <pre class="devsite-terminal devsite-click-to-copy">
-pip3 install https://github.com/google-coral/pycoral/releases/download/release-frogfish/tflite_runtime-2.5.0-cp37-cp37m-linux_armv7l.whl
+pip3 install --extra-index-url https://google-coral.github.io/py-repo/ tflite_runtime
 </pre>
 
-Note: If you're on Debian Linux and using TensorFlow Lite with a Coral ML
-accelerator, using pip to install `tflite_runtime` may not be compatible with
-other Coral libraries. To ensure all your libraries are compatible, instead
-install `tflite_runtime` as a
-[Debian package from Coral](https://coral.ai/software/#debian-packages).
+If you'd like to manually install a Python wheel, you can select one from
+[all `tflite_runtime` wheels](https://github.com/google-coral/pycoral/releases/).
+
+Note: If you're on Debian Linux and you install the `tflite_runtime` using pip,
+it can cause runtime failures when using other software that you installed as
+Debian packages and that depends on TF Lite (such as
+[Coral libraries](https://coral.ai/software/)). You can fix it if you uninstall
+`tflite_runtime` with pip and then reinstall it with the `apt-get` commands
+above.
 
 ## Run an inference using tflite_runtime