Need help with an array problem.

John Machin sjmachin at lexicon.net
Tue Oct 3 00:08:43 CEST 2006


SpreadTooThin wrote:
> Basically I think the problem is in converting from a 32 bit integer to
> a 16 bit integer.
>
> I have two arrays:
> import array
>
> a = array.array('L', [65537])
> b = array.array('H', [0])
>
> b[0] = a[0]
>
> Which gives an overflow message....

As it should.

> So can't I truncate the long by discaring the upper bits ..
> Like  b[0] = 0x0000FFFF & a[0]

Any reason why you don't you just try it?

| >>> import array
| >>> a = array.array('L', [65537])
| >>> b = array.array('H', [0])
| >>> a[0]
| 65537L
| >>> a[0] & 0xffff
| 1L
| >>> b[0] = a[0] & 0xffff
| >>> b[0]
| 1
| >>>




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