Timed execution in eval

[castironpi at gmail.com]

On Mar 7, 4:07 pm, Steven D'Aprano <st... at REMOVE-THIS-
cybersource.com.au> wrote:
> > I want to be able to detect if [certain threads] fail with error,
>
> You can't? Why ever not?

Try this.  ext can be found in 'C Function in a Python Context' on
google groops.

import ext
extA= ext.Ext()
extA[ 'araise' ]= r"""
    int araise( int a, PyObject* exc ) {
        int res= PyThreadState_SetAsyncExc( a, exc);
        return res;
    }
    """, ("i","i","O")

LastCallException= type( 'LastCallException', ( Exception, ),
{ 'canstayhere': True } )
import thread
import threading
import time
partystart= threading.Event()
doorsclose= threading.Event()
def thd():
    partystart.set()
    try:
        while 1:
            print( 'running, ha ha!' )
            time.sleep( .2 )
    except Exception:
        print( '\nclean thread exit\n' )
    finally:
        doorsclose.set()

partyid= thread.start_new_thread( thd, () )
partystart.wait()
print( 'waiting a second\n' )
time.sleep( 1 )
ret= extA.araise( partyid, LastCallException )
doorsclose.wait( 1 )
if not doorsclose.isSet():
    print( 'Tell me about it.' )
print( 'clean exit\n' )

'''
waiting a second
running, ha ha!
running, ha ha!
running, ha ha!
running, ha ha!
running, ha ha!
clean thread exit
clean exit
'''