add python path in ats.sh

Author: caroljung-cg

.circleci/ats.sh

@@ -1,4 +1,7 @@
 #!/usr/bin/env bash
+# Set PYTHONPATH at the start
+export PYTHONPATH="${PYTHONPATH:-.}:${PWD}"
+
 if ! command -v jq &> /dev/null; then
     apt update
     apt install jq -y