missing iostream import #1969

	name: pip build linux

	on: [push, pull_request]

	jobs:
	build:
	name: build pip wheel
	runs-on: ubuntu-latest
	# cf. https://github.com/GUDHI/gudhi-deploy/blob/main/Dockerfile_for_pip
	container: gudhi/pip_for_gudhi:latest
	steps:
	- uses: actions/checkout@v3
	with:
	submodules: true
	- name: Build wheel for Python 3.6
	run: \|
	mkdir build_36
	cd build_36
	cmake -DCMAKE_BUILD_TYPE=Release -DPYTHON_EXECUTABLE=$PYTHON36/bin/python ..
	cd src/python
	$PYTHON36/bin/python -m build -n -w
	auditwheel repair dist/*.whl
	- name: Install and test wheel for Python 3.6
	run: \|
	$PYTHON36/bin/python -m pip install --user pytest build_36/src/python/dist/*.whl
	$PYTHON36/bin/python -m pip install numpy --upgrade
	$PYTHON36/bin/python -c "import gudhi; print(gudhi.__version__)"
	$PYTHON36/bin/python -m pytest -v src/python/test/test_alpha_complex.py
	$PYTHON36/bin/python -m pytest -v src/python/test/test_bottleneck_distance.py
	$PYTHON36/bin/python -m pytest -v src/python/test/test_cubical_complex.py
	$PYTHON36/bin/python -m pytest -v src/python/test/test_rips_complex.py
	- name: Upload linux python wheel
	uses: actions/upload-artifact@v3
	with:
	name: linux python wheel
	path: build_36/src/python/wheelhouse/*.whl

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