Christopher Barker wrote:
> Jeff Whitaker wrote:
>
>> John: 'rU' apparently doesn't work for gzipped text files (at least
>> in python 2.5.2). I had to change the default in back to 'r' when
>> using gzip.open (r6846 in trunk).
>
> darn -- sounds like a bug/missing feature in the gzip module. Strange
> , though, unknown flags seem to be ignored by file(), and gzip.open
> seems to ignore the 'U' too, in my tests (see below).
>
> I think having the 'U' ignored is less than optimal, but doesn't make
> anything worse than it is. What problems did you have?
Chris: If you have basemap, try running the simpletest.py example with
matplotlib svn r6845. When the filehandle is obtained using 'rU', it's
reading garbage from the gzipped file. Using 'r', it's fine.
-Jeff
>
> tests (on an OS-X system - native unix newlines):
> (python 2.5.2)
>
> >>> file('test_newlines.txt', 'rb').read()
> 'line 1: unix \nline 2: dos \r\nline 3: mac \rline 4: unix \n'
> >>> file('test_newlines.txt', 'r').read()
> 'line 1: unix \nline 2: dos \r\nline 3: mac \rline 4: unix \n'
> >>> file('test_newlines.txt', 'U').read()
> 'line 1: unix \nline 2: dos \nline 3: mac \nline 4: unix \n'
>
> # so file() does the right thing
>
> >>> gzip.open('test_newlines.txt.gz', 'rb').read()
> 'line 1: unix \nline 2: dos \r\nline 3: mac \rline 4: unix \n'
> >>> gzip.open('test_newlines.txt.gz', 'r').read()
> 'line 1: unix \nline 2: dos \r\nline 3: mac \rline 4: unix \n'
> >>> gzip.open('test_newlines.txt.gz', 'rU').read()
> 'line 1: unix \nline 2: dos \r\nline 3: mac \rline 4: unix \n'
>
>
> # gzip.open() appears to ignore the 'U' flag -- too bad!
>
> should we post a bug report/feature request to Python?
>
> -Chris
>
>
>
>
--
Jeffrey S. Whitaker Phone : (303)497-6313
Meteorologist FAX : (303)497-6449
NOAA/OAR/PSD R/PSD1 Email : jeffrey.s.whita...@noaa.gov
325 Broadway Office : Skaggs Research Cntr 1D-113
Boulder, CO, USA 80303-3328 Web : http://tinyurl.com/5telg
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