[Numpy-discussion] column_stack with mixed data types

Robert Kern robert.kern@gmail....
Tue Jul 31 02:32:31 CDT 2007


Sebastian Haase wrote:
> On 7/31/07, Robert Kern <robert.kern@gmail.com> wrote:
>> Ryan Krauss wrote:
>>> I just tend to think in terms of lists rather than tuples.  Why is a
>>> tuple a more reasonable choice than a list?  (I'm really asking and
>>> not being argumentative, since you can't hear my tone.)
>> The key thing is that the type of the container of records is different from the
>> type of the record, so you'd either have to have a list of tuples (or a list of
>> lists of ... tuples) or a tuple of lists. There is a tendency to use lists for
>> homogeneous collections and tuples for inhomogeneous collections; Guido says
>> that this is the main difference in how he uses tuples and lists. When you get
>> an answer to a DB-API2 SQL query, you get a list of (usually augmented) tuples.
>>
> This is the best explanation I have heard about this  yet.
> Where does he say this ? Just for reference ....

http://mail.python.org/pipermail/python-dev/2003-March/033964.html

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco


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