xDS Interop: require Python 3.7 (#31323)

tools/internal_ci/linux/grpc_xds_k8s_install_test_driver.sh

@@ -16,7 +16,7 @@
 set -eo pipefail
 
 # Constants
-readonly PYTHON_VERSION="${PYTHON_VERSION:-3.6}"
+readonly PYTHON_VERSION="${PYTHON_VERSION:-3.7}"
 # Test driver
 readonly TEST_DRIVER_REPO_NAME="grpc"
 readonly TEST_DRIVER_REPO_URL="https://github.com/${TEST_DRIVER_REPO_OWNER:-grpc}/grpc.git"

tools/run_tests/xds_k8s_test_driver/README.md

@@ -24,7 +24,7 @@ changes to this codebase at the moment.
 ## Installation
 
 #### Requirements
-1. Python v3.6+
+1. Python v3.7+
 2. [Google Cloud SDK](https://cloud.google.com/sdk/docs/install)
 3. `kubectl`
 
@@ -174,7 +174,7 @@ export KUBE_CONTEXT="$(kubectl config current-context)"
 
 ```shell
 # Create python virtual environment
-python3.6 -m venv venv
+python3.7 -m venv venv
 
 # Activate virtual environment
 . ./venv/bin/activate

tools/run_tests/xds_k8s_test_driver/requirements.txt

@@ -1,7 +1,6 @@
 Mako~=1.1
 PyYAML~=5.3
 absl-py~=0.11
-dataclasses~=0.8; python_version < '3.7'
 google-api-python-client~=1.12
 google-cloud-secret-manager~=2.1
 grpcio~=1.34