[issue31880] subprocess process interaction with IDLEX GUI causes pygnuplot silent failures

Roger Serwy added the comment: I am closing this issue. For future reference, IDLEX is a separate project from IDLE. Please refer IDLEX bugs to the project developer (me). -- assignee: -> terry.reedy components: +IDLE -Interpreter Core, Windows nosy: +roger.serwy, terry.reedy stage:

[issue31880] subprocess process interaction with IDLEX GUI causes pygnuplot silent failures

John Brearley added the comment: I retested with Python 3.6.4 upgrades and the issue no longer occurs. You may want to close this issue. -- ___ Python tracker

[issue31880] subprocess process interaction with IDLEX GUI causes pygnuplot silent failures

John Brearley added the comment: The owner of PyGnuplot figured out that for Python 3.4+ that a flush on stdin is needed. IDLEX GUI now runs example.py and my own test code correctly. proc.stdin.flush() # send the command in python 3.4+ This leaves the interesting

[issue31880] subprocess process interaction with IDLEX GUI causes pygnuplot silent failures

John Brearley added the comment: Additonal testing shows that the subprocess.run command will reliably interact directly with gnuplot, either from the IDLEX GUI or the Python terminal window. import subprocess def run_cmd(cmd): print("run_cmd cmd:", cmd) # MUST

[issue31880] subprocess process interaction with IDLEX GUI causes pygnuplot silent failures

New submission from John Brearley : There is an interesting interaction between the IDLEX GUI and subprocess module that causes pygnuplot silent failures. The example.py script below works fine when run from the WinPython Command Prompt.exe terminal window. The script will