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# -*- coding: utf-8 -*-
"""Test Parallel magics
Authors:
* Min RK
"""
#-------------------------------------------------------------------------------
# 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 re
import sys
import time
import zmq
from nose import SkipTest
from IPython.testing import decorators as dec
from IPython.testing.ipunittest import ParametricTestCase
from IPython.utils.io import capture_output
from IPython import parallel as pmod
from IPython.parallel import error
from IPython.parallel import AsyncResult
from IPython.parallel.util import interactive
from IPython.parallel.tests import add_engines
from .clienttest import ClusterTestCase, generate_output
def setup():
add_engines(3, total=True)
class TestParallelMagics(ClusterTestCase, ParametricTestCase):
def test_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])
# just 'print a' works ~99% of the time, but this ensures that
# the stdout message has arrived when the result is finished:
with capture_output() as io:
ip.magic(
'px import sys,time;print(a);sys.stdout.flush();time.sleep(0.2)'
)
out = io.stdout
self.assertTrue('[stdout:' in out, out)
self.assertFalse('\n\n' in out)
self.assertTrue(out.rstrip().endswith('10'))
self.assertRaisesRemote(ZeroDivisionError, ip.magic, 'px 1/0')
def _check_generated_stderr(self, stderr, n):
expected = [
r'\[stderr:\d+\]',
'^stderr$',
'^stderr2$',
] * n
self.assertFalse('\n\n' in stderr, stderr)
lines = stderr.splitlines()
self.assertEquals(len(lines), len(expected), stderr)
for line,expect in zip(lines, expected):
if isinstance(expect, str):
expect = [expect]
for ex in expect:
self.assertTrue(re.search(ex, line) is not None, "Expected %r in %r" % (ex, line))
def test_cellpx_block_args(self):
"""%%px --[no]block flags work"""
ip = get_ipython()
v = self.client[-1:]
v.activate()
v.block=False
for block in (True, False):
v.block = block
ip.magic("pxconfig --verbose")
with capture_output() as io:
ip.run_cell_magic("px", "", "1")
if block:
self.assertTrue(io.stdout.startswith("Parallel"), io.stdout)
else:
self.assertTrue(io.stdout.startswith("Async"), io.stdout)
with capture_output() as io:
ip.run_cell_magic("px", "--block", "1")
self.assertTrue(io.stdout.startswith("Parallel"), io.stdout)
with capture_output() as io:
ip.run_cell_magic("px", "--noblock", "1")
self.assertTrue(io.stdout.startswith("Async"), io.stdout)
def test_cellpx_groupby_engine(self):
"""%%px --group-outputs=engine"""
ip = get_ipython()
v = self.client[:]
v.block = True
v.activate()
v['generate_output'] = generate_output
with capture_output() as io:
ip.run_cell_magic('px', '--group-outputs=engine', 'generate_output()')
self.assertFalse('\n\n' in io.stdout)
lines = io.stdout.splitlines()
expected = [
r'\[stdout:\d+\]',
'stdout',
'stdout2',
r'\[output:\d+\]',
r'IPython\.core\.display\.HTML',
r'IPython\.core\.display\.Math',
r'Out\[\d+:\d+\]:.*IPython\.core\.display\.Math',
] * len(v)
self.assertEquals(len(lines), len(expected), io.stdout)
for line,expect in zip(lines, expected):
if isinstance(expect, str):
expect = [expect]
for ex in expect:
self.assertTrue(re.search(ex, line) is not None, "Expected %r in %r" % (ex, line))
self._check_generated_stderr(io.stderr, len(v))
def test_cellpx_groupby_order(self):
"""%%px --group-outputs=order"""
ip = get_ipython()
v = self.client[:]
v.block = True
v.activate()
v['generate_output'] = generate_output
with capture_output() as io:
ip.run_cell_magic('px', '--group-outputs=order', 'generate_output()')
self.assertFalse('\n\n' in io.stdout)
lines = io.stdout.splitlines()
expected = []
expected.extend([
r'\[stdout:\d+\]',
'stdout',
'stdout2',
] * len(v))
expected.extend([
r'\[output:\d+\]',
'IPython.core.display.HTML',
] * len(v))
expected.extend([
r'\[output:\d+\]',
'IPython.core.display.Math',
] * len(v))
expected.extend([
r'Out\[\d+:\d+\]:.*IPython\.core\.display\.Math'
] * len(v))
self.assertEquals(len(lines), len(expected), io.stdout)
for line,expect in zip(lines, expected):
if isinstance(expect, str):
expect = [expect]
for ex in expect:
self.assertTrue(re.search(ex, line) is not None, "Expected %r in %r" % (ex, line))
self._check_generated_stderr(io.stderr, len(v))
def test_cellpx_groupby_type(self):
"""%%px --group-outputs=type"""
ip = get_ipython()
v = self.client[:]
v.block = True
v.activate()
v['generate_output'] = generate_output
with capture_output() as io:
ip.run_cell_magic('px', '--group-outputs=type', 'generate_output()')
self.assertFalse('\n\n' in io.stdout)
lines = io.stdout.splitlines()
expected = []
expected.extend([
r'\[stdout:\d+\]',
'stdout',
'stdout2',
] * len(v))
expected.extend([
r'\[output:\d+\]',
r'IPython\.core\.display\.HTML',
r'IPython\.core\.display\.Math',
] * len(v))
expected.extend([
(r'Out\[\d+:\d+\]', r'IPython\.core\.display\.Math')
] * len(v))
self.assertEquals(len(lines), len(expected), io.stdout)
for line,expect in zip(lines, expected):
if isinstance(expect, str):
expect = [expect]
for ex in expect:
self.assertTrue(re.search(ex, line) is not None, "Expected %r in %r" % (ex, line))
self._check_generated_stderr(io.stderr, len(v))
def test_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])
ip.magic('pxconfig --verbose')
with capture_output() as io:
ar = ip.magic('px print (a)')
self.assertTrue(isinstance(ar, AsyncResult))
self.assertTrue('Async' in io.stdout)
self.assertFalse('[stdout:' in io.stdout)
self.assertFalse('\n\n' in io.stdout)
ar = ip.magic('px 1/0')
self.assertRaisesRemote(ZeroDivisionError, ar.get)
def test_autopx_blocking(self):
ip = get_ipython()
v = self.client[-1]
v.activate()
v.block=True
with capture_output() as io:
ip.magic('autopx')
ip.run_cell('\n'.join(('a=5','b=12345','c=0')))
ip.run_cell('b*=2')
ip.run_cell('print (b)')
ip.run_cell('b')
ip.run_cell("b/c")
ip.magic('autopx')
output = io.stdout
self.assertTrue(output.startswith('%autopx enabled'), output)
self.assertTrue(output.rstrip().endswith('%autopx disabled'), output)
self.assertTrue('ZeroDivisionError' in output, output)
self.assertTrue('\nOut[' in output, output)
self.assertTrue(': 24690' in output, output)
ar = v.get_result(-1)
self.assertEquals(v['a'], 5)
self.assertEquals(v['b'], 24690)
self.assertRaisesRemote(ZeroDivisionError, ar.get)
def test_autopx_nonblocking(self):
ip = get_ipython()
v = self.client[-1]
v.activate()
v.block=False
with capture_output() as io:
ip.magic('autopx')
ip.run_cell('\n'.join(('a=5','b=10','c=0')))
ip.run_cell('print (b)')
ip.run_cell('import time; time.sleep(0.1)')
ip.run_cell("b/c")
ip.run_cell('b*=2')
ip.magic('autopx')
output = io.stdout.rstrip()
self.assertTrue(output.startswith('%autopx enabled'))
self.assertTrue(output.endswith('%autopx disabled'))
self.assertFalse('ZeroDivisionError' in output)
ar = v.get_result(-2)
self.assertRaisesRemote(ZeroDivisionError, ar.get)
# prevent TaskAborted on pulls, due to ZeroDivisionError
time.sleep(0.5)
self.assertEquals(v['a'], 5)
# b*=2 will not fire, due to abort
self.assertEquals(v['b'], 10)
def test_result(self):
ip = get_ipython()
v = self.client[-1]
v.activate()
data = dict(a=111,b=222)
v.push(data, block=True)
for name in ('a', 'b'):
ip.magic('px ' + name)
with capture_output() as io:
ip.magic('pxresult')
output = io.stdout
msg = "expected %s output to include %s, but got: %s" % \
('%pxresult', str(data[name]), output)
self.assertTrue(str(data[name]) in output, msg)
@dec.skipif_not_matplotlib
def test_px_pylab(self):
"""%pylab works on engines"""
ip = get_ipython()
v = self.client[-1]
v.block = True
v.activate()
with capture_output() as io:
ip.magic("px %pylab inline")
self.assertTrue("Welcome to pylab" in io.stdout, io.stdout)
self.assertTrue("backend_inline" in io.stdout, io.stdout)
with capture_output() as io:
ip.magic("px plot(rand(100))")
self.assertTrue('Out[' in io.stdout, io.stdout)
self.assertTrue('matplotlib.lines' in io.stdout, io.stdout)
def test_pxconfig(self):
ip = get_ipython()
rc = self.client
v = rc.activate(-1, '_tst')
self.assertEquals(v.targets, rc.ids[-1])
ip.magic("%pxconfig_tst -t :")
self.assertEquals(v.targets, rc.ids)
ip.magic("%pxconfig_tst -t ::2")
self.assertEquals(v.targets, rc.ids[::2])
ip.magic("%pxconfig_tst -t 1::2")
self.assertEquals(v.targets, rc.ids[1::2])
ip.magic("%pxconfig_tst -t 1")
self.assertEquals(v.targets, 1)
ip.magic("%pxconfig_tst --block")
self.assertEquals(v.block, True)
ip.magic("%pxconfig_tst --noblock")
self.assertEquals(v.block, False)
def test_cellpx_targets(self):
"""%%px --targets doesn't change defaults"""
ip = get_ipython()
rc = self.client
view = rc.activate(rc.ids)
self.assertEquals(view.targets, rc.ids)
ip.magic('pxconfig --verbose')
for cell in ("pass", "1/0"):
with capture_output() as io:
try:
ip.run_cell_magic("px", "--targets all", cell)
except pmod.RemoteError:
pass
self.assertTrue('engine(s): all' in io.stdout)
self.assertEquals(view.targets, rc.ids)
def test_cellpx_block(self):
"""%%px --block doesn't change default"""
ip = get_ipython()
rc = self.client
view = rc.activate(rc.ids)
view.block = False
self.assertEquals(view.targets, rc.ids)
ip.magic('pxconfig --verbose')
for cell in ("pass", "1/0"):
with capture_output() as io:
try:
ip.run_cell_magic("px", "--block", cell)
except pmod.RemoteError:
pass
self.assertFalse('Async' in io.stdout)
self.assertFalse(view.block)
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