name : test_reloading.py from numpy.testing import ( assert_raises, assert_warns, assert_, assert_equal, IS_WASM, ) from numpy.compat import pickle import pytest 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 with assert_warns(UserWarning): reload(np) assert_(_NoValue is np._NoValue) assert_(ModuleDeprecationWarning is np.ModuleDeprecationWarning) assert_(VisibleDeprecationWarning is np.VisibleDeprecationWarning) assert_raises(RuntimeError, reload, numpy._globals) with assert_warns(UserWarning): 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), '<no value>') assert_(pickle.loads(pickle.dumps(np._NoValue, protocol=proto)) is np._NoValue) @pytest.mark.skipif(IS_WASM, reason="can't start subprocess") 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 from pytest import warns import numpy as np for k in list(sys.modules.keys()): if "numpy" in k: del sys.modules[k] with warns(UserWarning): import numpy as np """) p = subprocess.run([sys.executable, '-c', code], capture_output=True) if p.returncode: raise AssertionError( f"Non-zero return code: {p.returncode!r}\n\n{p.stderr.decode()}" )