[Tutor] Too many open files -- how to copy a folder?

[Chad Crabtree]

Matej Cepl wrote:

>>>>import email,email.Utils
>>>>import mailbox
>>>>box = mailbox.Maildir("/home/matej/WP/trash/")
>>>>date = email.Utils.parsedate_tz
>>>>import time
>>>>dlist = list(time.localtime())
>>>>dlist[1] -= 3
>>>>archdate = tuple(dlist)
>>>>alist = [x for x in box if date(x['date'])<archdate]
>>>>        
>>>>
>Traceback (most recent call last):
>  File "<stdin>", line 1, in ?
>  File "/usr/lib/python2.3/mailbox.py", line 246, in next
>IOError: [Errno 24] Too many open files:
>'/home/matej/WP/trash/cur/1098844013.6284.XKuCF:2,S'
>  
>
Perhaps instead of using a list comprehension you should use a
generator, if you wnat a generator expression then you need to
upgrade
to 2.4 however let's try and get the jist of this

def genBox(box):
    for x in box:
       if date(x['date'])<archdate:
          yield x

I have not tested this but I think this would call only one file at a
time.




		
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