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39 lines
1.4 KiB
Python

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