CI failure in io module

[eric-wieser]

https://travis-ci.org/github/pygae/clifford/jobs/751737929#L369-L388

This looks like a possible bug in h5py:

clifford/clifford/test/test_io.py

Lines 22 to 35 in a1b1ba3

	def test_write_and_read(self, tmp_path):
	file_name = str(tmp_path / "test.ga")
	basis_names = np.array(layout.basis_names, dtype=str)
	mv_array = ConformalMVArray([random_point_pair() for i in range(1000)]).value
	write_ga_file(file_name, mv_array, layout.metric, basis_names, compression=True,
	transpose=False, sparse=False, support=False)
	data_array, metric_2, basis_names_2, support = read_ga_file(file_name)
	np.testing.assert_equal(data_array, mv_array)
	np.testing.assert_equal(layout.metric, metric_2)
	np.testing.assert_equal(basis_names, basis_names_2)

>       np.testing.assert_equal(basis_names, basis_names_2)
E       AssertionError: 
E       Arrays are not equal
E       
E       Mismatched elements: 5 / 5 (100%)
E        x: array(['e1', 'e2', 'e3', 'e4', 'e5'], dtype='<U2')
E        y: array([b'e1', b'e2', b'e3', b'e4', b'e5'], dtype=object)

Somehow the array is being converted from str to bytes...

Versions:

• numpy: 1.19.4
• h5py: 3.1.0
• python: 3.8.6

[eric-wieser]

The conda CI succeeds, but only uses h5py-2.10.0