Possible to update pip in the public.ecr.aws/sam/build-python3.6 build image?

[camlow325]

The version of pip installed in the public.ecr.aws/sam/build-python3.6 image currently is 18.1. As mentioned in this psycopg2 project issue, older versions of pip (which include 18.1) fail to install the latest psycopg2 versions (2.9 or later).

If we upgrade to the latest pip version, 21.1.2, we are able to install the later psycopg2 versions without issues. Would it be possible to upgrade the default pip version in the public.ecr.aws/sam/build-python3.6 image to the latest version?

[hoffa]

You can pip install --upgrade pip for your use case, but I'd be somewhat wary of doing that by default for all consumers, as it's essentially upgrading the system pip (provided by the python3-pip Amazon Linux package) outside the package manager. Also, Python 3.6 is EOL, so it would be beneficial to move a more recent release, which include more recent pip releases as well.