mkstemp on pre-2.3 Python

[djw]

Hi, c.l.p'ers-

I working on some code that creates a temporary file on Linux. I found some
code that the BDFL posted previously on the newsgroup and adapted it for my
use. I can't get the "pre-2.3" code to work.


try:
make_temp_file = tempfile.mkstem p # 2.3+
except AttributeError:
def make_temp_file( suffix='', prefix='', dir='', text=False ): #pre-2.3
path = tempfile.mktemp ( suffix )
fd = os.open( path, os.O_WRONLY|os. O_CREAT|os.O_EX CL, 0700 )
os.unlink( path )
return ( os.fdopen( fd, 'w+b' ), path )



Here's the error:

File "utils.py", line 583, in make_temp_file
return ( os.fdopen( fd, 'w+b' ), path )
OSError: [Errno 22] Invalid argument

Anybody have any ideas on what I am doing wrong?

Thanks,

Don

[Nick Craig-Wood]

Re: mkstemp on pre-2.3 Python

djw <donald.welch@h p.com> wrote:[color=blue]
> Hi, c.l.p'ers-
>
> I working on some code that creates a temporary file on Linux. I found some
> code that the BDFL posted previously on the newsgroup and adapted it for my
> use. I can't get the "pre-2.3" code to work.
>
>
> try:
> make_temp_file = tempfile.mkstem p # 2.3+
> except AttributeError:
> def make_temp_file( suffix='', prefix='', dir='', text=False ): #pre-2.3
> path = tempfile.mktemp ( suffix )
> fd = os.open( path, os.O_WRONLY|os. O_CREAT|os.O_EX CL, 0700 )
> os.unlink( path )
> return ( os.fdopen( fd, 'w+b' ), path )
>
>
>
> Here's the error:
>
> File "utils.py", line 583, in make_temp_file
> return ( os.fdopen( fd, 'w+b' ), path )
> OSError: [Errno 22] Invalid argument
>
> Anybody have any ideas on what I am doing wrong?[/color]

Replace the os.O_WRONLY with os.O_RDWR and all will be fine
[color=blue][color=green][color=darkred]
>>> import tempfile, os
>>> suffix=""
>>> path = tempfile.mktemp ( suffix )
>>> fd = os.open( path, os.O_RDWR|os.O_ CREAT|os.O_EXCL , 0700 )
>>> f = os.fdopen( fd, 'w+b' )
>>> f[/color][/color][/color]
<open file '<fdopen>', mode 'w+b' at 0xb7de7a60>[color=blue][color=green][color=darkred]
>>> print >>f, "Hello"
>>> f.seek(0)
>>> f.read()[/color][/color][/color]
'Hello\n'[color=blue][color=green][color=darkred]
>>> f.close()[/color][/color][/color]

--
Nick Craig-Wood <nick@craig-wood.com> -- http://www.craig-wood.com/nick

[djw]

Re: mkstemp on pre-2.3 Python

Thank you very much, that was the ticket!

-Don


Nick Craig-Wood wrote:
[color=blue]
> djw <donald.welch@h p.com> wrote:[color=green]
>> Hi, c.l.p'ers-
>>
>> I working on some code that creates a temporary file on Linux. I found
>> some code that the BDFL posted previously on the newsgroup and adapted
>> it for my use. I can't get the "pre-2.3" code to work.
>>
>>
>> try:
>> make_temp_file = tempfile.mkstem p # 2.3+
>> except AttributeError:
>> def make_temp_file( suffix='', prefix='', dir='', text=False ):
>> #pre-2.3
>> path = tempfile.mktemp ( suffix )
>> fd = os.open( path, os.O_WRONLY|os. O_CREAT|os.O_EX CL, 0700 )
>> os.unlink( path )
>> return ( os.fdopen( fd, 'w+b' ), path )
>>
>>
>>
>> Here's the error:
>>
>> File "utils.py", line 583, in make_temp_file
>> return ( os.fdopen( fd, 'w+b' ), path )
>> OSError: [Errno 22] Invalid argument
>>
>> Anybody have any ideas on what I am doing wrong?[/color]
>
> Replace the os.O_WRONLY with os.O_RDWR and all will be fine
>[color=green][color=darkred]
>>>> import tempfile, os
>>>> suffix=""
>>>> path = tempfile.mktemp ( suffix )
>>>> fd = os.open( path, os.O_RDWR|os.O_ CREAT|os.O_EXCL , 0700 )
>>>> f = os.fdopen( fd, 'w+b' )
>>>> f[/color][/color]
> <open file '<fdopen>', mode 'w+b' at 0xb7de7a60>[color=green][color=darkred]
>>>> print >>f, "Hello"
>>>> f.seek(0)
>>>> f.read()[/color][/color]
> 'Hello\n'[color=green][color=darkred]
>>>> f.close()[/color][/color]
>[/color]