问题
According to the documentation here: https://cloud.google.com/composer/docs/release-notes
Composer (GCP's Airflow) is supposed to be available for Python 3 in the console. However, I am seeing no options for Python 3 in the console.
回答1:
Python3 support is a beta feature in Composer, this doc describes how to enable and use beta feature in Cloud Composer.
回答2:
I was confronted with the same problem and I was able to solve it.
Since there is a checkbox of Enable Beta Features on the upper right corner of the console screen, you can select it by enabling it here.
来源：https://stackoverflow.com/questions/52744840/composer-on-google-platform-not-available-for-python-3