stdout from Python is always behind stdout from Q when direct stdout to a file

[xiangpeng2008]

Questions

• [x] Which operating system are you using (if Linux, please provide flavour of it, i.e RedHat, CentOS or Ubuntu), is it 32-bit, or 64-bit?

  macOS Catalina 10.15.5

• [x] Which version of PyQ are you running? Please provide output of pyq --versions, if PyQ isn't operational, please provide Python interpreter version and PyQ version python -V; python3 -V; pip list | grep pyq:

PyQ 5.0.0 NumPy 1.18.4 KDB+ 3.6 (2018.06.14) m64 Python 3.7.7 (default, May 12 2020, 22:03:45) [Clang 11.0.0 (clang-1100.0.33.17)]

• [x] Which version of kdb+ are you using, is it 32-bit or 64-bit?

  64-bit

  • [ ] If on 64-bit, is your QLIC set? Please provide output env | grep QLIC on linux/macOS, or set|grep QLIC on Windows.

    not set

• [x] Did you use virtual environment to install PyQ? If not, why?

  • Yes

• [x] Where is your QHOME? Please provide output env | grep QHOME on linux/macOS, or set|grep QHOME on Windows.

  QHOME=/Users/xiangpeng/venv37/q    

• [ ] Do you use Conda? If so, what version?

  No

Steps to reproduce the issue

printf "p)print('python') \nshow \"q\"; \n\\\\\n" > test.q; cat test.q $VIRTUAL_ENV/q/m64/q test.q $VIRTUAL_ENV/q/m64/q test.q > test.log cat test.log

Expected result

python "q"

Actual result

"q" python

Workaround

If you know workaround, please provide it here.

[sashkab]

Did you try to use p)print('python', flush=True)?

$ cat test.q
p)print('python', flush=True)
show "q";
\
$ QHOME=$VIRTUAL_ENV/q  $VIRTUAL_ENV/q/m64/q test.q
python
"q"

[xiangpeng2008]

Thanks !