Bugs item #1615275, was opened at 2006-12-13 16:20 Message generated for change (Comment added) made by draghuram You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=105470&aid=1615275&group_id=5470
Please note that this message will contain a full copy of the comment thread, including the initial issue submission, for this request, not just the latest update. Category: Extension Modules Group: Platform-specific Status: Open Resolution: None Priority: 5 Private: No Submitted By: hirzel (hirzel) Assigned to: Nobody/Anonymous (nobody) Summary: tempile.TemporaryFile differences between linux and windows Initial Comment: This bug came up when trying to write a numpy array to a tempfile.TemporaryFile() using the numpy 'tofile' method on windows using python 2.4. with a numpy array 'a', and a TemporaryFile 'f', on windows: >>> a.tofile(f) throws an IOError, where on Linux it does not. On windows, you must use a.tofile(f.file) The cause of this difference is that in windows, tempfile.TemporaryFile() returns <type 'instance'> that has a 'file' attribute of <type 'file'>, whereas in linux tempfile.TemporaryFile() returns <type 'file'> and there is no 'file' attribute. Ideally, the windows version would align with linux, and the module documentation and TemporaryFile() would return a <type 'file'>. If this is not possible, it seems like the linux version and docs should be changed to match the windows version to align cross-platform behavior. At least, that seems to be the shared opinion of this thread from the mailing list: numpy-discussion. http://www.mail-archive.com/numpy-discussion@scipy.org/msg00271.html To my knowledge, while platform differences in tempfile have been reported in the past, this one has not. ---------------------------------------------------------------------- Comment By: Raghuram Devarakonda (draghuram) Date: 2007-03-28 10:43 Message: Logged In: YES user_id=984087 Originator: NO I used the following code to reproduce the problem on windows XP. ---------- import array import tempfile testarray = array.array('B') testarray.fromstring("\x00\x00\x00") f = tempfile.TemporaryFile() testarray.tofile(f) ----------- This works fine on linux but on windows, it gives the following error: ------------- Traceback (most recent call last): File "c:\rags\tofile.py", line 7, in <module> testarray.tofile(f) TypeError: arg must be open file ------------- Changing "f" to "f.file" seems to work, though, as explained in the initial post. So this may be the same problem as OP reported even though I am getting TypeError and he mentioned IOError. I tested with 2.4 and 2.5 as I don't know how to set up python development environment on windows (yet). I will see if I can set that up first before working on the "fix". Raghu. ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=105470&aid=1615275&group_id=5470 _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
