feat(python): ensure string `on` parameters to `join/join_asof` are unique #2599

	name: Test Bytecode Parser

	on:
	pull_request:
	paths:
	- py-polars/**
	- .github/workflows/test-bytecode-parser.yml

	concurrency:
	group: ${{ github.workflow }}-${{ github.ref }}
	cancel-in-progress: true

	jobs:
	ubuntu:
	runs-on: ubuntu-latest
	strategy:
	fail-fast: false
	matrix:
	python-version: ['3.8', '3.9', '3.10', '3.11']

	steps:
	- uses: actions/checkout@v4

	- name: Set up Python
	uses: actions/setup-python@v4
	with:
	python-version: ${{ matrix.python-version }}

	- name: Install dependencies
	run: pip install ipython numpy pytest

	- name: Run tests
	working-directory: py-polars
	run: PYTHONPATH=polars/utils pytest tests/test_udfs.py

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