Deploying Python Flask app to Google App Engine - version errors

[Bjørn-Jostein Singstad]

I am trying to deploy a Python Flask application on Google Cloud Platform (App Engine). The app works fine locally on my computer. I use Tensorflow version 2.3.0 in my app. This seems to be a problem when I try to deploy the app to Google Cloud Platform. I get this error code in the build log when trying to build the app:

Collecting tensorflow==2.3.0 (from -r requirements.txt (line 2))

Step #1:   Could not find a version that satisfies the requirement tensorflow==2.3.0 (from -r requirements.txt (line 2)) (from versions: 0.12.1, 1.0.0, 1.0.1, 1.1.0rc0, 1.1.0rc1, 1.1.0rc2, 1.1.0

, 1.2.0rc0, 1.2.0rc1, 1.2.0rc2, 1.2.0, 1.2.1, 1.3.0rc0, 1.3.0rc1, 1.3.0rc2, 1.3.0, 1.4.0rc0, 1.4.0rc1, 1.4.0, 1.4.1, 1.5.0rc0, 1.5.0rc1, 1.5.0, 1.5.1, 1.6.0rc0, 1.6.0rc1, 1.6.0, 1.7.0rc0, 1.7.0r

c1, 1.7.0, 1.7.1, 1.8.0rc0, 1.8.0rc1, 1.8.0, 1.9.0rc0, 1.9.0rc1, 1.9.0rc2, 1.9.0, 1.10.0rc0, 1.10.0rc1, 1.10.0, 1.10.1, 1.11.0rc0, 1.11.0rc1, 1.11.0rc2, 1.11.0, 1.12.0rc0, 1.12.0rc1, 1.12.0rc2, 

1.12.0, 1.12.2, 1.12.3, 1.13.0rc0, 1.13.0rc1, 1.13.0rc2, 1.13.1, 1.13.2, 1.14.0rc0, 1.14.0rc1, 1.14.0, 2.0.0a0, 2.0.0b0, 2.0.0b1)

Step #1: No matching distribution found for tensorflow==2.3.0 (from -r requirements.txt (line 2))

Step #1: You are using pip version 10.0.1, however version 20.2.3 is available.

Step #1: You should consider upgrading via the 'pip install --upgrade pip' command.

Step #1: The command '/bin/sh -c pip install -r requirements.txt' returned a tanon-zero code: 1

Finished Step #1

ERROR

ERROR: build step 1 "gcr.io/cloud-builders/docker@sha256:c1128bf8a32cfe4f2efcb920551a71a43d3401d3a3631f8b745e90b75099b68e" failed: step exited with non-zero status: 1

Step #1: 

In my YAML file i have specified that the app should run on Python 3.7:

entrypoint: "gunicorn -b:$PORT main:app"

env: flex

runtime: python

runtime_config: 

  python_version: 3.7

But for me it seems as python 2.7 also is involved in some way:

 ---> Running in b2db92615defStep #1: Running virtualenv with interpreter /opt/python3.7/bin/python3.7Step #1: Using base prefix '/opt/python3.7'Step #1: /usr/local/lib/python2.7/dist-packages/virtualenv.py:1041: DeprecationWarning: the imp module is deprecated in favour of importlib; see the module's documentation for alternative usesStep #1: import impStep #1: New python executable in /env/bin/python3.7Step #1: Also creating executable in /env/bin/python  

My requirement file looks like this:

```

pip==20.2.3

tensorflow==2.3.0

Flask==0.11.1

gunicorn==19.5.0

numpy==1.17.4

scipy==1.4.1

h5py==2.10.0

```

I tried to update pip in the Google Cloud Shell before deploying the application and it seems to work ok, but when I deploy my app it goes back to the old pip version.

[Dustin Ingram]

Using "python_version: 3.7" isn't valid, see https://cloud.google.com/appengine/docs/flexible/python/runtime#interpreter

In addition, the version of pip that you're using in Cloud Shell doesn't have an effect on the version of pip used when your application is deployed.

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