[pypy-dev] a bug of pypy:don't auto close the file handler.

[聂宝鹏]

description:
pypy don't close file opened in a function.the the program exit after 
run a while because it open too
many files which exceed the limited of system.
     the code is :
#!/usr/bin/env python
import os,time,signal
last = {}
now = {}
def stack(s,f):
     global now,last
     last = now
     now = {}
     lines=open("/proc/net/dev","rt").readlines()
     #f=open("/proc/net/dev")
     #lines=f.readlines()
     #f.close()
     ls=lines[2:] #del the header line
     for m in range(0,len(ls)):
         l=ls[m] # l = per line
         name,l=l.split(':') # name = dev ,l = other;
         l=l.split() # l = other.split items.
         bytes_in = l[0]
         bytes_out = l[8]
         packets_in = l[1]
         packets_out = l[9]
         now[name]={}
         now[name]['bytes_in']=bytes_in
         now[name]['bytes_out']=bytes_out
         now[name]['packets_in']=packets_in
         now[name]['packets_out']=packets_out
     if last:
         print '-'*80
         for name in now.iterkeys():
             print "dev: 
%s\tbytes:\trx:%.2fMb/s\ttx:%.2fMb/s\tpackets\trx:%s\ttx:%s" % 
(name,       int ( int(now[name]['bytes_in']) - 
int(last[name]['bytes_in']) 
)/1024.0/1024.0*8.0,int(int(now[name]['bytes_out'])-int(last[name]['bytes_out']))/1024.0/1024.0*8.0 
,
                                                                    int 
( int(now[name]['packets_in']) - int(last[name]['packets_in']) 
),int(int(now[name]['packets_out'])-int(last[name]['packets_out'])) )
         print '-'*80
if __name__=='__main__':
     signal.signal(signal.SIGALRM,stack)
     signal.setitimer(signal.ITIMER_REAL,0.01,1.0)
     while 1 :
         signal.pause()