Re: numeric module
"coffeebug" <[EMAIL PROTECTED]> writes: > I cannot import "numarray" and I cannot import "numeric" using python > 2.3.3 numarray and Numeric are separate modules available at http://numpy.sourceforge.net/ If you're doing anything numerical in Python, you'll want them :-) -- |>|\/|< /--\ |David M. Cooke |cookedm(at)physics(dot)mcmaster(dot)ca -- http://mail.python.org/mailman/listinfo/python-list
Re: numeric module
[EMAIL PROTECTED] writes: > Hello, > What's the problem with this code? I get the following error message: > > File "test.py", line 26, in test > print tbl[wi][bi] > IndexError: index must be either an int or a sequence > > ---code snippet > > from Numeric import * > tbl = zeros((32, 16)) > > def test(): > > val = testme() > wi = val >> 4 > bi = val & 0xFL [above changed to use val instead of crc, as you mentioned in another post] > print wi > print bi > print tbl[wi][bi] tbl[wi][bi] would be indexing the bi'th element of whatever tbl[wi] returns. For Numeric arrays, you need tbl[wi,bi] Now, you'll have another problem as Terry Reedy mentioned: the indices (in Numeric) need to be Python ints, not longs. You could rewrite your test() function as def test(): val = testme() wi = int(val >> 4) bi = int(val & 0xF) print wi print bi print tbl[wi,bi] and that'll work. -- |>|\/|< /--\ |David M. Cooke |cookedm(at)physics(dot)mcmaster(dot)ca -- http://mail.python.org/mailman/listinfo/python-list
Re: numeric module
<[EMAIL PROTECTED]> wrote in message news:[EMAIL PROTECTED] > What's the problem with this code? I get the following error message: 2.4 or earlier? > File "test.py", line 26, in test >print tbl[wi][bi] > IndexError: index must be either an int or a sequence Longs are not ints; message implies that Numeric, unlike Python, does not allow them as indexes. > from Numeric import * > tbl = zeros((32, 16)) > > def test(): > >val = testme() val is never used >wi = crc >> 4 crc is never set, so how did this run? >bi = crc & 0xFL making bi a long. Try 0xF which should be faster anyway. >print wi >print bi print type(wi), type(bi) >print tbl[wi][bi] > > def testme(): >val = 0xFFL >val >>= 23 >return val > > if __name__ == '__main__': >test() -- http://mail.python.org/mailman/listinfo/python-list
Re: numeric module
I cannot import "numarray" and I cannot import "numeric" using python 2.3.3 Where would I find an equivalent definition for zeros()? Anyway, is there supposed to be something that sets the value of elements of tbl to values other than zero? Not that the question has anything to do with Shama's problem (recognizing tbl as a two-dimensional array). -- http://mail.python.org/mailman/listinfo/python-list
Re: numeric module
Thanks Steve. There's a problem with Numeric array. I tried with numarray and it works fine. -SB -- http://mail.python.org/mailman/listinfo/python-list
Re: numeric module
[EMAIL PROTECTED] wrote: Hello, What's the problem with this code? I get the following error message: File "test.py", line 26, in test print tbl[wi][bi] IndexError: index must be either an int or a sequence ---code snippet from Numeric import * tbl = zeros((32, 16)) def test(): val = testme() wi = crc >> 4 bi = crc & 0xFL print wi print bi print tbl[wi][bi] def testme(): val = 0xFFL val >>= 23 return val if __name__ == '__main__': test() Hmm... I can't reproduce this with numarray. Maybe this only exists in Numeric? Are you sure that the code here is what produced the error? py> import numarray as na py> tbl = na.zeros((32, 16)) py> def test(): ... val = testme() ... wi = val >> 4 ... bi = val & 0xFL ... print wi ... print bi ... print tbl[wi][bi] ... py> def testme(): ... val = 0xFFL ... val >>= 23 ... return val ... py> test() 0 1 0 STeVe -- http://mail.python.org/mailman/listinfo/python-list
Re: numeric module
The table initializes to a 2 dimensional with zeros. -SB -- http://mail.python.org/mailman/listinfo/python-list
Re: numeric module
I don't know much here...but is there an assumption you're making about the machine word size to be greather than 24 bits? Also, more to the point, does the function zeros() instantiate a two-dimensional table? If so, does it populate the table with any values? The error looks like tbl[ ][ ] doesn't get defined. Thanks for patience! -- http://mail.python.org/mailman/listinfo/python-list
Re: numeric module
In function test(), Read wi and bi as: wi = val >> 4 bi = val & 0xFL -SB -- http://mail.python.org/mailman/listinfo/python-list