How can I specify Python versions in Travis CI?

How can I specify Python versions in Travis CI?

You can specify Python versions in your .travis.yml file under the language and python keys. For example:

language: python
python:
  - "3.6"
  - "3.7"
  - "3.8"

This will run your tests on Python 3.6, 3.7, and 3.8.

Can I use a specific version like 3.9.1?

Yes, you can specify exact versions as well. Just include it in the python list like this:

python:
  - "3.9.1"

This will ensure that Travis CI uses Python 3.9.1 for your builds.

What if I want to use a different environment?

You can specify different environments by using the env key in your .travis.yml. For example:

env:
  - MY_ENV_VAR=value

This allows you to set environment variables for your builds.

Is there a way to check the available Python versions on Travis CI?

Yes, you can check the available Python versions by visiting the Travis CI documentation or by running a build with the python key set to "3.x" to see the latest available versions.