[Numpy-discussion] fromfile croaking on windows

[Albert Strasheim]

Hello all

Travis Oliphant wrote:
> Mathew Yeates wrote:
> > when I try and load a file with numpy.fromfile I keep getting a message
> ....
> > 7245092 items requested but only 3899 read. Its always the same number
> read.
> >
> >
> Which platform are you on?   Could you show exactly how you are calling
> the function.
> 
> There were some reports of strange behavior on Windows that may be
> related to file-locking.  I'm just not sure at this point.

I did some experiments.

With my test file, this always fails:

y = N.fromfile('temp.dat', dtype=N.float64)

This works:

y = N.fromfile(file('temp.dat','rb'), dtype=N.float64)

More details in this ticket:

http://projects.scipy.org/scipy/numpy/ticket/103

I don't quite understand how file-locking can be causing these problems.
Travis, care to elaborate on what you think might be causing these problems?

Cheers,

Albert