Elegant solution needed: Data manipulation
Scott David Daniels
Scott.Daniels at Acm.Org
Thu Jan 31 01:52:44 EST 2002
On Wed, 30 Jan 2002 19:42:24 -0600, "Jason Orendorff" <jason at jorendorff.com> wrote:
> Mark wrote:
> ... lots of great suff...
> # Step 1. Build your data structure out of objects.
> class DataRow:
> def __init__(self, height, weight, speed):
> self.height = height
> self.weight = weight
> self.speed = speed
I'd replace this with the following more general piece:
def __init__(self, **kwargs):
', '.join(['%s=%r' % entry for entry
in vars(self).items()]), ')'))
> # You can write the part the reads it out of a file.
> # Here is what the resulting data structure should be.
> data = [ DataRow(3, 6, 12),
> DataRow(5, 9, 20),
> DataRow(4, 10, 15) ]
In which case you'll need this to be:
data = [ Data(height=3, width=6, speed=12),
Data(height=5, width=9, speed=20),
Data(height=4, width=10, speed=15) ]
and everything else works the same way.
The nice thing about this class is
(1) it expands to whatever types you like, and
(2) it prints nicely.
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