[Pythonmac-SIG] Bug in Numeric?

[Chris Barker]

Chris Lee wrote:
>  >>> import Numeric
>  >>> t = open("Macintosh HD:Users:cjl:Desktop:100902teu:00")
>  >>> g = t.read()

all is well here. You now have a string with your data in it.

>  >>> g = Numeric.reshape(g,(512,512))

You shouldn't expect this to work. reshape() takes an array as the first
argument. You have passed it a string.

>  >>> h = Numeric.array(g, 'I')
> following which MacPython hard crashes...

I wouldn't expect this to work either. the array() constuctor expects a
sequence of numbers (or maybe charactors, for type 'c'). HOwever, it
shouldn't hard crash, either...

What I think you want to do is take the data in a string, and make an
array out of it. Use the fromstring() function:

g = Numeric.fromstring(g,'b') # I thinkyou want 'b' as it sounds like
you data is single byte unsigned integers.

g.shape = (512,512)

should do it.

-Chris


-- 
Christopher Barker, Ph.D.
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