[Tutor] Improving My Simple Game Code for Speed, Memory and Learning

Dave Angel davea at davea.name
Sun Jan 4 03:57:20 CET 2015

On 01/03/2015 06:10 PM, WolfRage wrote:
> On 01/03/2015 04:42 PM, Dave Angel wrote:
>> self.transposed_grid = list( zip(*self.grid) )
> This results in the same thing with or with out the list() wrapper. Using
> Python 3.4.0 (default, Apr 11 2014, 13:05:11)
> [GCC 4.8.2] on linux

In Python 3, zip() returns an iterator.  So you can traverse it once.  I 
don't believe the second time is guaranteed to be the same.  A list is 
what you want.


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