Fix pytest warnings

docs/examples/lattice/phosphorene.py

@@ -81,10 +81,10 @@ def phosphorene_4band():
 kx = pi / ax
 ky = pi / ay
 bands = solver.calc_bands([kx, ky], [kx, 0], [0, 0], [0, ky], [kx, ky])
-bands.plot(point_labels=['S', 'Y', '$\Gamma$', 'X', 'S'])
+bands.plot(point_labels=["S", "Y", r"$\Gamma$", "X", "S"])
 plt.show()
 
 
 model.lattice.plot_brillouin_zone(decorate=False)
-bands.plot_kpath(point_labels=['S', 'Y', '$\Gamma$', 'X', 'S'])
+bands.plot_kpath(point_labels=["S", "Y", r"$\Gamma$", "X", "S"])
 plt.show()

docs/examples/ribbons/bilayer_graphene.py

@@ -43,5 +43,5 @@ def bilayer_graphene():
 
 solver = pb.solver.lapack(model)
 bands = solver.calc_bands(-pi/graphene.a, pi/graphene.a)
-bands.plot(point_labels=['$-\pi / a$', '$\pi / a$'])
+bands.plot(point_labels=[r"$-\pi / a$", r"$\pi / a$"])
 plt.show()

docs/test_examples.py

@@ -16,4 +16,5 @@ def example_file(request):
 def test_docs(example_file):
     """Make sure all example files execute without error"""
     filename = str(example_file)
-    exec(compile(open(filename, 'rb').read(), filename, 'exec'), {})
+    with open(filename, "rb") as file:
+        exec(compile(file.read(), filename, "exec"), {})

docs/tutorial/shape_symmetry_example.py

@@ -32,7 +32,7 @@ def contains(x, y, z):
 solver = pb.solver.arpack(model, k=10)
 a = 3.8  # [nm] unit cell length
 bands = solver.calc_bands(-pi/a, pi/a)
-bands.plot(point_labels=['$-\pi / a$', '$\pi / a$'])
+bands.plot(point_labels=[r'$-\pi / a$', r'$\pi / a$'])
 plt.show()
 
 

setup.cfg

@@ -3,3 +3,4 @@ addopts = --doctest-modules --ignore=setup.py --ignore=docs/conf.py
 testpaths = pybinding tests docs
 norecursedirs = .* *.egg build cpp* dist docs/*
 minversion = 3.0
+filterwarnings = ignore::ImportWarning