Quitting interfaces

sage.interfaces.quit.expect_quitall(verbose=False)

EXAMPLES:

sage: sage.interfaces.quit.expect_quitall()
sage: gp.eval('a=10')                                                           # needs sage.libs.pari
'10'
sage: gp('a')                                                                   # needs sage.libs.pari
10
sage: sage.interfaces.quit.expect_quitall()
sage: gp('a')                                                                   # needs sage.libs.pari
a
sage: sage.interfaces.quit.expect_quitall(verbose=True)                         # needs sage.libs.pari
Exiting PARI/GP interpreter with PID ... running .../gp --fast --emacs --quiet --stacksize 10000000

sage.interfaces.quit.invalidate_all()

Invalidate all of the expect interfaces.

This is used, e.g., by the fork-based @parallel decorator.

EXAMPLES:

sage: # needs sage.libs.pari sage.symbolic
sage: a = maxima(2); b = gp(3)
sage: a, b
(2, 3)
sage: sage.interfaces.quit.invalidate_all()
sage: a
(invalid Maxima object -- The maxima session in which this object was defined is no longer running.)
sage: b
(invalid PARI/GP interpreter object -- The pari session in which this object was defined is no longer running.)

However the maxima and gp sessions should still work out, though with their state reset:

sage: a = maxima(2); b = gp(3)                                                  # needs sage.libs.pari sage.symbolic
sage: a, b                                                                      # needs sage.libs.pari sage.symbolic
(2, 3)

sage.interfaces.quit.is_running(pid)

Return True if and only if there is a process with id pid running.

sage.interfaces.quit.kill_spawned_jobs(verbose=False)

INPUT:

• verbose – bool (default: False); if True, display a message each time a process is sent a kill signal

EXAMPLES:

sage: gp.eval('a=10')                                                           # needs sage.libs.pari
'10'
sage: sage.interfaces.quit.kill_spawned_jobs(verbose=False)
sage: sage.interfaces.quit.expect_quitall()
sage: gp.eval('a=10')                                                           # needs sage.libs.pari
'10'
sage: sage.interfaces.quit.kill_spawned_jobs(verbose=True)                      # needs sage.libs.pari
Killing spawned job ...

After doing the above, we do the following to avoid confusion in other doctests:

sage: sage.interfaces.quit.expect_quitall()

sage.interfaces.quit.register_spawned_process(pid, cmd='')

Write a line to the spawned_processes file with the given pid and cmd.

sage.interfaces.quit.sage_spawned_process_file()

EXAMPLES:

sage: from sage.interfaces.quit import sage_spawned_process_file
sage: len(sage_spawned_process_file()) > 1
True