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35 lines
1.3 KiB
35 lines
1.3 KiB
from __future__ import print_function
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import sys
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if not sys.argv[1:]:
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from subprocess import Popen, PIPE
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p = Popen([sys.executable, __file__, 'subprocess'], stdin=PIPE, stdout=PIPE, stderr=PIPE)
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out, err = p.communicate(b'hello world\n')
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code = p.poll()
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assert p.poll() == 0, (out, err, code)
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assert out.strip() == b'11 chars.', (out, err, code)
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# XXX: This is seen sometimes to fail on Travis with the following value in err but a code of 0;
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# it seems load related:
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# 'Unhandled exception in thread started by \nsys.excepthook is missing\nlost sys.stderr\n'.
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# If warnings are enabled, Python 3 has started producing this:
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# '...importlib/_bootstrap.py:219: ImportWarning: can't resolve package from __spec__
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# or __package__, falling back on __name__ and __path__\n return f(*args, **kwds)\n'
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assert err == b'' or b'sys.excepthook' in err or b'Warning' in err, (out, err, code)
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elif sys.argv[1:] == ['subprocess']: # pragma: no cover
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import gevent
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import gevent.monkey
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gevent.monkey.patch_all(sys=True)
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def printline():
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try:
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line = raw_input()
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except NameError:
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line = input()
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print('%s chars.' % len(line))
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gevent.spawn(printline).join()
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else: # pragma: no cover
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sys.exit('Invalid arguments: %r' % (sys.argv, ))
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