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test_view.py
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test_view.py
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"""test View objects"""
# -*- coding: utf-8 -*-
#-------------------------------------------------------------------------------
# Copyright (C) 2011 The IPython Development Team
#
# Distributed under the terms of the BSD License. The full license is in
# the file COPYING, distributed as part of this software.
#-------------------------------------------------------------------------------
#-------------------------------------------------------------------------------
# Imports
#-------------------------------------------------------------------------------
import sys
import time
from tempfile import mktemp
from StringIO import StringIO
import zmq
from IPython import parallel as pmod
from IPython.parallel import error
from IPython.parallel import AsyncResult, AsyncHubResult, AsyncMapResult
from IPython.parallel import DirectView
from IPython.parallel.util import interactive
from IPython.parallel.tests import add_engines
from .clienttest import ClusterTestCase, crash, wait, skip_without
def setup():
add_engines(3)
class TestView(ClusterTestCase):
def test_z_crash_mux(self):
"""test graceful handling of engine death (direct)"""
# self.add_engines(1)
eid = self.client.ids[-1]
ar = self.client[eid].apply_async(crash)
self.assertRaisesRemote(error.EngineError, ar.get)
eid = ar.engine_id
tic = time.time()
while eid in self.client.ids and time.time()-tic < 5:
time.sleep(.01)
self.client.spin()
self.assertFalse(eid in self.client.ids, "Engine should have died")
def test_push_pull(self):
"""test pushing and pulling"""
data = dict(a=10, b=1.05, c=range(10), d={'e':(1,2),'f':'hi'})
t = self.client.ids[-1]
v = self.client[t]
push = v.push
pull = v.pull
v.block=True
nengines = len(self.client)
push({'data':data})
d = pull('data')
self.assertEquals(d, data)
self.client[:].push({'data':data})
d = self.client[:].pull('data', block=True)
self.assertEquals(d, nengines*[data])
ar = push({'data':data}, block=False)
self.assertTrue(isinstance(ar, AsyncResult))
r = ar.get()
ar = self.client[:].pull('data', block=False)
self.assertTrue(isinstance(ar, AsyncResult))
r = ar.get()
self.assertEquals(r, nengines*[data])
self.client[:].push(dict(a=10,b=20))
r = self.client[:].pull(('a','b'), block=True)
self.assertEquals(r, nengines*[[10,20]])
def test_push_pull_function(self):
"test pushing and pulling functions"
def testf(x):
return 2.0*x
t = self.client.ids[-1]
v = self.client[t]
v.block=True
push = v.push
pull = v.pull
execute = v.execute
push({'testf':testf})
r = pull('testf')
self.assertEqual(r(1.0), testf(1.0))
execute('r = testf(10)')
r = pull('r')
self.assertEquals(r, testf(10))
ar = self.client[:].push({'testf':testf}, block=False)
ar.get()
ar = self.client[:].pull('testf', block=False)
rlist = ar.get()
for r in rlist:
self.assertEqual(r(1.0), testf(1.0))
execute("def g(x): return x*x")
r = pull(('testf','g'))
self.assertEquals((r[0](10),r[1](10)), (testf(10), 100))
def test_push_function_globals(self):
"""test that pushed functions have access to globals"""
@interactive
def geta():
return a
# self.add_engines(1)
v = self.client[-1]
v.block=True
v['f'] = geta
self.assertRaisesRemote(NameError, v.execute, 'b=f()')
v.execute('a=5')
v.execute('b=f()')
self.assertEquals(v['b'], 5)
def test_push_function_defaults(self):
"""test that pushed functions preserve default args"""
def echo(a=10):
return a
v = self.client[-1]
v.block=True
v['f'] = echo
v.execute('b=f()')
self.assertEquals(v['b'], 10)
def test_get_result(self):
"""test getting results from the Hub."""
c = pmod.Client(profile='iptest')
# self.add_engines(1)
t = c.ids[-1]
v = c[t]
v2 = self.client[t]
ar = v.apply_async(wait, 1)
# give the monitor time to notice the message
time.sleep(.25)
ahr = v2.get_result(ar.msg_ids)
self.assertTrue(isinstance(ahr, AsyncHubResult))
self.assertEquals(ahr.get(), ar.get())
ar2 = v2.get_result(ar.msg_ids)
self.assertFalse(isinstance(ar2, AsyncHubResult))
c.spin()
c.close()
def test_run_newline(self):
"""test that run appends newline to files"""
tmpfile = mktemp()
with open(tmpfile, 'w') as f:
f.write("""def g():
return 5
""")
v = self.client[-1]
v.run(tmpfile, block=True)
self.assertEquals(v.apply_sync(lambda f: f(), pmod.Reference('g')), 5)
def test_apply_tracked(self):
"""test tracking for apply"""
# self.add_engines(1)
t = self.client.ids[-1]
v = self.client[t]
v.block=False
def echo(n=1024*1024, **kwargs):
with v.temp_flags(**kwargs):
return v.apply(lambda x: x, 'x'*n)
ar = echo(1, track=False)
self.assertTrue(isinstance(ar._tracker, zmq.MessageTracker))
self.assertTrue(ar.sent)
ar = echo(track=True)
self.assertTrue(isinstance(ar._tracker, zmq.MessageTracker))
self.assertEquals(ar.sent, ar._tracker.done)
ar._tracker.wait()
self.assertTrue(ar.sent)
def test_push_tracked(self):
t = self.client.ids[-1]
ns = dict(x='x'*1024*1024)
v = self.client[t]
ar = v.push(ns, block=False, track=False)
self.assertTrue(isinstance(ar._tracker, zmq.MessageTracker))
self.assertTrue(ar.sent)
ar = v.push(ns, block=False, track=True)
self.assertTrue(isinstance(ar._tracker, zmq.MessageTracker))
self.assertEquals(ar.sent, ar._tracker.done)
ar._tracker.wait()
self.assertTrue(ar.sent)
ar.get()
def test_scatter_tracked(self):
t = self.client.ids
x='x'*1024*1024
ar = self.client[t].scatter('x', x, block=False, track=False)
self.assertTrue(isinstance(ar._tracker, zmq.MessageTracker))
self.assertTrue(ar.sent)
ar = self.client[t].scatter('x', x, block=False, track=True)
self.assertTrue(isinstance(ar._tracker, zmq.MessageTracker))
self.assertEquals(ar.sent, ar._tracker.done)
ar._tracker.wait()
self.assertTrue(ar.sent)
ar.get()
def test_remote_reference(self):
v = self.client[-1]
v['a'] = 123
ra = pmod.Reference('a')
b = v.apply_sync(lambda x: x, ra)
self.assertEquals(b, 123)
def test_scatter_gather(self):
view = self.client[:]
seq1 = range(16)
view.scatter('a', seq1)
seq2 = view.gather('a', block=True)
self.assertEquals(seq2, seq1)
self.assertRaisesRemote(NameError, view.gather, 'asdf', block=True)
@skip_without('numpy')
def test_scatter_gather_numpy(self):
import numpy
from numpy.testing.utils import assert_array_equal, assert_array_almost_equal
view = self.client[:]
a = numpy.arange(64)
view.scatter('a', a)
b = view.gather('a', block=True)
assert_array_equal(b, a)
def test_map(self):
view = self.client[:]
def f(x):
return x**2
data = range(16)
r = view.map_sync(f, data)
self.assertEquals(r, map(f, data))
def test_scatterGatherNonblocking(self):
data = range(16)
view = self.client[:]
view.scatter('a', data, block=False)
ar = view.gather('a', block=False)
self.assertEquals(ar.get(), data)
@skip_without('numpy')
def test_scatter_gather_numpy_nonblocking(self):
import numpy
from numpy.testing.utils import assert_array_equal, assert_array_almost_equal
a = numpy.arange(64)
view = self.client[:]
ar = view.scatter('a', a, block=False)
self.assertTrue(isinstance(ar, AsyncResult))
amr = view.gather('a', block=False)
self.assertTrue(isinstance(amr, AsyncMapResult))
assert_array_equal(amr.get(), a)
def test_execute(self):
view = self.client[:]
# self.client.debug=True
execute = view.execute
ar = execute('c=30', block=False)
self.assertTrue(isinstance(ar, AsyncResult))
ar = execute('d=[0,1,2]', block=False)
self.client.wait(ar, 1)
self.assertEquals(len(ar.get()), len(self.client))
for c in view['c']:
self.assertEquals(c, 30)
def test_abort(self):
view = self.client[-1]
ar = view.execute('import time; time.sleep(0.25)', block=False)
ar2 = view.apply_async(lambda : 2)
ar3 = view.apply_async(lambda : 3)
view.abort(ar2)
view.abort(ar3.msg_ids)
self.assertRaises(error.TaskAborted, ar2.get)
self.assertRaises(error.TaskAborted, ar3.get)
def test_temp_flags(self):
view = self.client[-1]
view.block=True
with view.temp_flags(block=False):
self.assertFalse(view.block)
self.assertTrue(view.block)
def test_importer(self):
view = self.client[-1]
view.clear(block=True)
with view.importer:
import re
@interactive
def findall(pat, s):
# this globals() step isn't necessary in real code
# only to prevent a closure in the test
re = globals()['re']
return re.findall(pat, s)
self.assertEquals(view.apply_sync(findall, '\w+', 'hello world'), 'hello world'.split())
# parallel magic tests
def test_magic_px_blocking(self):
ip = get_ipython()
v = self.client[-1]
v.activate()
v.block=True
ip.magic_px('a=5')
self.assertEquals(v['a'], 5)
ip.magic_px('a=10')
self.assertEquals(v['a'], 10)
sio = StringIO()
savestdout = sys.stdout
sys.stdout = sio
ip.magic_px('print a')
sys.stdout = savestdout
sio.read()
self.assertTrue('[stdout:%i]'%v.targets in sio.buf)
self.assertRaisesRemote(ZeroDivisionError, ip.magic_px, '1/0')
def test_magic_px_nonblocking(self):
ip = get_ipython()
v = self.client[-1]
v.activate()
v.block=False
ip.magic_px('a=5')
self.assertEquals(v['a'], 5)
ip.magic_px('a=10')
self.assertEquals(v['a'], 10)
sio = StringIO()
savestdout = sys.stdout
sys.stdout = sio
ip.magic_px('print a')
sys.stdout = savestdout
sio.read()
self.assertFalse('[stdout:%i]'%v.targets in sio.buf)
ip.magic_px('1/0')
ar = v.get_result(-1)
self.assertRaisesRemote(ZeroDivisionError, ar.get)
def test_magic_autopx_blocking(self):
ip = get_ipython()
v = self.client[-1]
v.activate()
v.block=True
sio = StringIO()
savestdout = sys.stdout
sys.stdout = sio
ip.magic_autopx()
ip.run_cell('\n'.join(('a=5','b=10','c=0')))
ip.run_cell('print b')
ip.run_cell("b/c")
ip.run_code(compile('b*=2', '', 'single'))
ip.magic_autopx()
sys.stdout = savestdout
sio.read()
output = sio.buf.strip()
self.assertTrue(output.startswith('%autopx enabled'))
self.assertTrue(output.endswith('%autopx disabled'))
self.assertTrue('RemoteError: ZeroDivisionError' in output)
ar = v.get_result(-2)
self.assertEquals(v['a'], 5)
self.assertEquals(v['b'], 20)
self.assertRaisesRemote(ZeroDivisionError, ar.get)
def test_magic_autopx_nonblocking(self):
ip = get_ipython()
v = self.client[-1]
v.activate()
v.block=False
sio = StringIO()
savestdout = sys.stdout
sys.stdout = sio
ip.magic_autopx()
ip.run_cell('\n'.join(('a=5','b=10','c=0')))
ip.run_cell('print b')
ip.run_cell("b/c")
ip.run_code(compile('b*=2', '', 'single'))
ip.magic_autopx()
sys.stdout = savestdout
sio.read()
output = sio.buf.strip()
self.assertTrue(output.startswith('%autopx enabled'))
self.assertTrue(output.endswith('%autopx disabled'))
self.assertFalse('ZeroDivisionError' in output)
ar = v.get_result(-2)
self.assertEquals(v['a'], 5)
self.assertEquals(v['b'], 20)
self.assertRaisesRemote(ZeroDivisionError, ar.get)
def test_magic_result(self):
ip = get_ipython()
v = self.client[-1]
v.activate()
v['a'] = 111
ra = v['a']
ar = ip.magic_result()
self.assertEquals(ar.msg_ids, [v.history[-1]])
self.assertEquals(ar.get(), 111)
ar = ip.magic_result('-2')
self.assertEquals(ar.msg_ids, [v.history[-2]])
def test_unicode_execute(self):
"""test executing unicode strings"""
v = self.client[-1]
v.block=True
code=u"a=u'é'"
v.execute(code)
self.assertEquals(v['a'], u'é')
def test_unicode_apply_result(self):
"""test unicode apply results"""
v = self.client[-1]
r = v.apply_sync(lambda : u'é')
self.assertEquals(r, u'é')
def test_unicode_apply_arg(self):
"""test passing unicode arguments to apply"""
v = self.client[-1]
@interactive
def check_unicode(a, check):
assert isinstance(a, unicode), "%r is not unicode"%a
assert isinstance(check, bytes), "%r is not bytes"%check
assert a.encode('utf8') == check, "%s != %s"%(a,check)
for s in [ u'é', u'ßø®∫','asdf'.decode() ]:
try:
v.apply_sync(check_unicode, s, s.encode('utf8'))
except error.RemoteError as e:
if e.ename == 'AssertionError':
self.fail(e.evalue)
else:
raise e