from numpy.testing import assert_raises, assert_, assert_equal from numpy.compat import pickle import sys import subprocess import textwrap from importlib import reload def test_numpy_reloading(): # gh-7844. Also check that relevant globals retain their identity. import numpy as np import numpy._globals _NoValue = np._NoValue VisibleDeprecationWarning = np.VisibleDeprecationWarning ModuleDeprecationWarning = np.ModuleDeprecationWarning reload(np) assert_(_NoValue is np._NoValue) assert_(ModuleDeprecationWarning is np.ModuleDeprecationWarning) assert_(VisibleDeprecationWarning is np.VisibleDeprecationWarning) assert_raises(RuntimeError, reload, numpy._globals) reload(np) assert_(_NoValue is np._NoValue) assert_(ModuleDeprecationWarning is np.ModuleDeprecationWarning) assert_(VisibleDeprecationWarning is np.VisibleDeprecationWarning) def test_novalue(): import numpy as np for proto in range(2, pickle.HIGHEST_PROTOCOL + 1): assert_equal(repr(np._NoValue), '') assert_(pickle.loads(pickle.dumps(np._NoValue, protocol=proto)) is np._NoValue) def test_full_reimport(): """At the time of writing this, it is *not* truly supported, but apparently enough users rely on it, for it to be an annoying change when it started failing previously. """ # Test within a new process, to ensure that we do not mess with the # global state during the test run (could lead to cryptic test failures). # This is generally unsafe, especially, since we also reload the C-modules. code = textwrap.dedent(r""" import sys import numpy as np for k in list(sys.modules.keys()): if "numpy" in k: del sys.modules[k] import numpy as np """) p = subprocess.run([sys.executable, '-c', code]) assert p.returncode == 0