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# -*- coding: utf-8 -*-
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"""Test Parallel magics
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Authors:
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* Min RK
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"""
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#-------------------------------------------------------------------------------
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# Copyright (C) 2011 The IPython Development Team
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#
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# Distributed under the terms of the BSD License. The full license is in
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# the file COPYING, distributed as part of this software.
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#-------------------------------------------------------------------------------
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#-------------------------------------------------------------------------------
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# Imports
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#-------------------------------------------------------------------------------
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import re
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import time
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from IPython.testing import decorators as dec
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from IPython.utils.io import capture_output
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from IPython import parallel as pmod
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from IPython.parallel import AsyncResult
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from IPython.parallel.tests import add_engines
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from .clienttest import ClusterTestCase, generate_output
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def setup():
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add_engines(3, total=True)
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class TestParallelMagics(ClusterTestCase):
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def test_px_blocking(self):
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ip = get_ipython()
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v = self.client[-1:]
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v.activate()
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v.block=True
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ip.magic('px a=5')
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self.assertEqual(v['a'], [5])
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ip.magic('px a=10')
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self.assertEqual(v['a'], [10])
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# just 'print a' works ~99% of the time, but this ensures that
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# the stdout message has arrived when the result is finished:
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with capture_output() as io:
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ip.magic(
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'px import sys,time;print(a);sys.stdout.flush();time.sleep(0.2)'
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)
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self.assertIn('[stdout:', io.stdout)
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self.assertNotIn('\n\n', io.stdout)
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assert io.stdout.rstrip().endswith('10')
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self.assertRaisesRemote(ZeroDivisionError, ip.magic, 'px 1/0')
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def _check_generated_stderr(self, stderr, n):
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expected = [
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r'\[stderr:\d+\]',
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'^stderr$',
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'^stderr2$',
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] * n
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self.assertNotIn('\n\n', stderr)
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lines = stderr.splitlines()
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self.assertEqual(len(lines), len(expected), stderr)
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for line,expect in zip(lines, expected):
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if isinstance(expect, str):
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expect = [expect]
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for ex in expect:
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assert re.search(ex, line) is not None, "Expected %r in %r" % (ex, line)
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def test_cellpx_block_args(self):
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"""%%px --[no]block flags work"""
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ip = get_ipython()
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v = self.client[-1:]
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v.activate()
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v.block=False
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for block in (True, False):
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v.block = block
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ip.magic("pxconfig --verbose")
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with capture_output(display=False) as io:
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ip.run_cell_magic("px", "", "1")
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if block:
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assert io.stdout.startswith("Parallel"), io.stdout
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else:
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assert io.stdout.startswith("Async"), io.stdout
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with capture_output(display=False) as io:
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ip.run_cell_magic("px", "--block", "1")
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assert io.stdout.startswith("Parallel"), io.stdout
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with capture_output(display=False) as io:
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ip.run_cell_magic("px", "--noblock", "1")
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assert io.stdout.startswith("Async"), io.stdout
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def test_cellpx_groupby_engine(self):
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"""%%px --group-outputs=engine"""
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ip = get_ipython()
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v = self.client[:]
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v.block = True
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v.activate()
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v['generate_output'] = generate_output
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with capture_output(display=False) as io:
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ip.run_cell_magic('px', '--group-outputs=engine', 'generate_output()')
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self.assertNotIn('\n\n', io.stdout)
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lines = io.stdout.splitlines()
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expected = [
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r'\[stdout:\d+\]',
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'stdout',
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'stdout2',
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r'\[output:\d+\]',
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r'IPython\.core\.display\.HTML',
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r'IPython\.core\.display\.Math',
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r'Out\[\d+:\d+\]:.*IPython\.core\.display\.Math',
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] * len(v)
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self.assertEqual(len(lines), len(expected), io.stdout)
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for line,expect in zip(lines, expected):
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if isinstance(expect, str):
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expect = [expect]
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for ex in expect:
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assert re.search(ex, line) is not None, "Expected %r in %r" % (ex, line)
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self._check_generated_stderr(io.stderr, len(v))
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def test_cellpx_groupby_order(self):
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"""%%px --group-outputs=order"""
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ip = get_ipython()
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v = self.client[:]
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v.block = True
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v.activate()
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v['generate_output'] = generate_output
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with capture_output(display=False) as io:
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ip.run_cell_magic('px', '--group-outputs=order', 'generate_output()')
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self.assertNotIn('\n\n', io.stdout)
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lines = io.stdout.splitlines()
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expected = []
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expected.extend([
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r'\[stdout:\d+\]',
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'stdout',
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'stdout2',
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] * len(v))
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expected.extend([
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r'\[output:\d+\]',
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'IPython.core.display.HTML',
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] * len(v))
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expected.extend([
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r'\[output:\d+\]',
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'IPython.core.display.Math',
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] * len(v))
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expected.extend([
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r'Out\[\d+:\d+\]:.*IPython\.core\.display\.Math'
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] * len(v))
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self.assertEqual(len(lines), len(expected), io.stdout)
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for line,expect in zip(lines, expected):
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if isinstance(expect, str):
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expect = [expect]
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for ex in expect:
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assert re.search(ex, line) is not None, "Expected %r in %r" % (ex, line)
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self._check_generated_stderr(io.stderr, len(v))
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def test_cellpx_groupby_type(self):
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"""%%px --group-outputs=type"""
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ip = get_ipython()
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v = self.client[:]
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v.block = True
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v.activate()
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v['generate_output'] = generate_output
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with capture_output(display=False) as io:
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ip.run_cell_magic('px', '--group-outputs=type', 'generate_output()')
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self.assertNotIn('\n\n', io.stdout)
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lines = io.stdout.splitlines()
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expected = []
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expected.extend([
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r'\[stdout:\d+\]',
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'stdout',
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'stdout2',
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] * len(v))
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expected.extend([
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r'\[output:\d+\]',
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r'IPython\.core\.display\.HTML',
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r'IPython\.core\.display\.Math',
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] * len(v))
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expected.extend([
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(r'Out\[\d+:\d+\]', r'IPython\.core\.display\.Math')
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] * len(v))
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self.assertEqual(len(lines), len(expected), io.stdout)
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for line,expect in zip(lines, expected):
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if isinstance(expect, str):
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expect = [expect]
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for ex in expect:
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assert re.search(ex, line) is not None, "Expected %r in %r" % (ex, line)
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self._check_generated_stderr(io.stderr, len(v))
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def test_px_nonblocking(self):
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ip = get_ipython()
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v = self.client[-1:]
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v.activate()
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v.block=False
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ip.magic('px a=5')
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self.assertEqual(v['a'], [5])
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ip.magic('px a=10')
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self.assertEqual(v['a'], [10])
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ip.magic('pxconfig --verbose')
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with capture_output() as io:
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ar = ip.magic('px print (a)')
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self.assertIsInstance(ar, AsyncResult)
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self.assertIn('Async', io.stdout)
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self.assertNotIn('[stdout:', io.stdout)
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self.assertNotIn('\n\n', io.stdout)
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ar = ip.magic('px 1/0')
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self.assertRaisesRemote(ZeroDivisionError, ar.get)
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def test_autopx_blocking(self):
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ip = get_ipython()
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v = self.client[-1]
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v.activate()
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v.block=True
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with capture_output(display=False) as io:
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ip.magic('autopx')
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ip.run_cell('\n'.join(('a=5','b=12345','c=0')))
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ip.run_cell('b*=2')
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ip.run_cell('print (b)')
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ip.run_cell('b')
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ip.run_cell("b/c")
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ip.magic('autopx')
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output = io.stdout
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assert output.startswith('%autopx enabled'), output
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assert output.rstrip().endswith('%autopx disabled'), output
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self.assertIn('ZeroDivisionError', output)
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self.assertIn('\nOut[', output)
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self.assertIn(': 24690', output)
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ar = v.get_result(-1)
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self.assertEqual(v['a'], 5)
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self.assertEqual(v['b'], 24690)
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self.assertRaisesRemote(ZeroDivisionError, ar.get)
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def test_autopx_nonblocking(self):
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ip = get_ipython()
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v = self.client[-1]
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v.activate()
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v.block=False
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with capture_output() as io:
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ip.magic('autopx')
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ip.run_cell('\n'.join(('a=5','b=10','c=0')))
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ip.run_cell('print (b)')
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ip.run_cell('import time; time.sleep(0.1)')
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ip.run_cell("b/c")
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ip.run_cell('b*=2')
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ip.magic('autopx')
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output = io.stdout.rstrip()
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assert output.startswith('%autopx enabled'), output
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assert output.endswith('%autopx disabled'), output
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self.assertNotIn('ZeroDivisionError', output)
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ar = v.get_result(-2)
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self.assertRaisesRemote(ZeroDivisionError, ar.get)
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# prevent TaskAborted on pulls, due to ZeroDivisionError
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time.sleep(0.5)
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self.assertEqual(v['a'], 5)
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# b*=2 will not fire, due to abort
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self.assertEqual(v['b'], 10)
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def test_result(self):
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ip = get_ipython()
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v = self.client[-1]
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v.activate()
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data = dict(a=111,b=222)
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v.push(data, block=True)
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for name in ('a', 'b'):
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ip.magic('px ' + name)
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with capture_output(display=False) as io:
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ip.magic('pxresult')
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self.assertIn(str(data[name]), io.stdout)
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@dec.skipif_not_matplotlib
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def test_px_pylab(self):
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"""%pylab works on engines"""
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ip = get_ipython()
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v = self.client[-1]
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v.block = True
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v.activate()
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with capture_output() as io:
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ip.magic("px %pylab inline")
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self.assertIn("Populating the interactive namespace from numpy and matplotlib", io.stdout)
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with capture_output(display=False) as io:
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ip.magic("px plot(rand(100))")
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self.assertIn('Out[', io.stdout)
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self.assertIn('matplotlib.lines', io.stdout)
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def test_pxconfig(self):
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ip = get_ipython()
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rc = self.client
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v = rc.activate(-1, '_tst')
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self.assertEqual(v.targets, rc.ids[-1])
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ip.magic("%pxconfig_tst -t :")
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self.assertEqual(v.targets, rc.ids)
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ip.magic("%pxconfig_tst -t ::2")
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self.assertEqual(v.targets, rc.ids[::2])
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ip.magic("%pxconfig_tst -t 1::2")
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self.assertEqual(v.targets, rc.ids[1::2])
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ip.magic("%pxconfig_tst -t 1")
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self.assertEqual(v.targets, 1)
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ip.magic("%pxconfig_tst --block")
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self.assertEqual(v.block, True)
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ip.magic("%pxconfig_tst --noblock")
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self.assertEqual(v.block, False)
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def test_cellpx_targets(self):
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"""%%px --targets doesn't change defaults"""
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ip = get_ipython()
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rc = self.client
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view = rc.activate(rc.ids)
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self.assertEqual(view.targets, rc.ids)
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ip.magic('pxconfig --verbose')
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for cell in ("pass", "1/0"):
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with capture_output(display=False) as io:
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try:
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ip.run_cell_magic("px", "--targets all", cell)
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except pmod.RemoteError:
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pass
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self.assertIn('engine(s): all', io.stdout)
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self.assertEqual(view.targets, rc.ids)
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def test_cellpx_block(self):
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"""%%px --block doesn't change default"""
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ip = get_ipython()
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rc = self.client
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view = rc.activate(rc.ids)
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view.block = False
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self.assertEqual(view.targets, rc.ids)
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ip.magic('pxconfig --verbose')
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for cell in ("pass", "1/0"):
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with capture_output(display=False) as io:
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try:
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ip.run_cell_magic("px", "--block", cell)
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except pmod.RemoteError:
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pass
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self.assertNotIn('Async', io.stdout)
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self.assertEqual(view.block, False)
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