[python] sys.settraceback used within threads

[Pyro.699]

Hello, here is some sample code for which i am going to use for the basis of my question :)

x.py


import sys, linecache

global FileName
FileName = globals()['__file__']

def _trace(frame, event, arg):
if event == "line":
lineno = frame.f_lineno
filename = frame.f_code.co_filename
if filename == FileName: return _trace
line = linecache.getline(filename, lineno)
sys.__stdout__.write( "[%s]%s %s\n" % (lineno, filename, line.rstrip()) )
return _trace

class _stderr:
def __init__(self):
self.buff = ""

def write(self, out):
self.buff += out
if out.find("\n") != -1:
sys.__stdout__.write("[Error] %s"%self.buff)
self.buff = ""

class _stdout:
def write(self, out):
sys.__stdout__.write("[Out] %s"%out)

sys.stderr = _stderr()
sys.stdout = _stdout()
sys.settrace(_trace)


f = open("w.py")
exec(compile(f.read(), f.name, "exec"))
f.close()


w.py


import threading, time

class Tester(threading.Thread):
def __init__(self):
threading.Thread.__init__(self)
self.start()

def run(self):
for x in range(5):
sys.stdout.write("%i, %i\n"%(x, x*3))
int("t")

for y in range(5):
sys.stdout.write("%i, %i\n"%(y, y*3))

t = Tester()
time.sleep(1)
int("s")


The output is located at this link (http://pastebin.com/SqMnDSUv) (Ive taken out the un-necessary information). When i refer to "lines" they will relate to lines within this output file.

You will notice that in lines 7 to 24 the output behaves properly and is redirected to _stdout and the trace has been implemented properly (from _trace), displaying which lines were called and all of that jazz. Lines 32 to 38 properly used _stdout but there was no trace of the actions that were being taken. The error (caused by int("t")) was only formated with the special [Error] tag on the first line, not on every one; lines 53 to 60 however, did.

Any help in this area would be greatly appreciated :)

Thanks
~Cody

[Pyro.699]

found my problems...


threading.settrace
if out.count("\n") > 3 or out == "\n":