D.V.N.Sarma డి.వి.ఎన్.శర్మ wrote:
> Can somebody tell me why my IDLE hangs when asked setrecursionlimit.
>
>>>> x=GetSet(40)
>>>> x.var
> 40
>>>> x.__dict__
> {'var': 40}
>>>> del x.var
>>>> x.__dict__
> {}
>>>> import sys
>>>> sys.setrecursionlimit(7)
IDLE's commandline emulation needs the stack you just drastically reduced in
size to communicate with the GUI. It looks like the code is not written to
expect and cope with such a communication problem.
When I start IDLE from the commandline and try a slightly higher value
Python 2.7.6 (default, Jun 22 2015, 17:58:13)
[GCC 4.8.2] on linux2
Type "copyright", "credits" or "license()" for more information.
>>> import sys; sys.setrecursionlimit(25)
>>> ================================ RESTART
================================
I see the following
$ idle
----------------------------------------
Unhandled server exception!
Thread: SockThread
Client Address: ('127.0.0.1', 51058)
Request: <socket._socketobject object at 0x7fc9b89ebb40>
Traceback (most recent call last):
File "/usr/lib/python2.7/SocketServer.py", line 295, in
_handle_request_noblock
self.process_request(request, client_address)
File "/usr/lib/python2.7/SocketServer.py", line 321, in process_request
self.finish_request(request, client_address)
File "/usr/lib/python2.7/SocketServer.py", line 334, in finish_request
self.RequestHandlerClass(request, client_address, self)
File "/usr/lib/python2.7/idlelib/rpc.py", line 503, in __init__
SocketServer.BaseRequestHandler.__init__(self, sock, addr, svr)
File "/usr/lib/python2.7/SocketServer.py", line 649, in __init__
self.handle()
File "/usr/lib/python2.7/idlelib/run.py", line 291, in handle
rpc.RPCHandler.getresponse(self, myseq=None, wait=0.05)
File "/usr/lib/python2.7/idlelib/rpc.py", line 280, in getresponse
response = self._getresponse(myseq, wait)
File "/usr/lib/python2.7/idlelib/rpc.py", line 300, in _getresponse
response = self.pollresponse(myseq, wait)
File "/usr/lib/python2.7/idlelib/rpc.py", line 415, in pollresponse
qmsg = response_queue.get(0)
File "/usr/lib/python2.7/Queue.py", line 164, in get
if not self._qsize():
RuntimeError: maximum recursion depth exceeded
*** Unrecoverable, server exiting!
----------------------------------------
When I continue to use smaller stack sizes at
>>> ================================ RESTART
================================
>>> import sys; sys.setrecursionlimit(17)
I get
Unhandled server exception!
Thread: SockThread
Client Address: ('127.0.0.1', 51058)
Request: <socket._socketobject object at 0x7fe1b3f3eb40>
Traceback (most recent call last):
File "/usr/lib/python2.7/SocketServer.py", line 295, in
_handle_request_noblock
Unhandled exception in thread started by
and IDLE indeed hangs.
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