re.sub creative solution for Behind 2048 by gyahun_dash - python coding challenges

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re.sub solution in Creative category for Behind 2048 by gyahun_dash

from itertools import chain
from re import sub

def transpose(state):
    return [list(row) for row in zip(*state)]

def slide(row):
    strlist = str([cell for cell in row if cell > 0])
    compress = eval(sub(r'(?
                        June 16, 2014

                        
                            Comments:
                            
                                
                                    Cjkjvfnby
 on June 16, 2014, 8:52 p.m.

                                    <p>Are you sure that this is clear code?</p>

<pre class='brush: python'>eval(sub(r'(?&lt;!\d)(\d+), \1(?!\d)', r'2*\1', strlist))
</pre>

                                
                            
                                
                                    gyahun_dash
 on June 17, 2014, 12:38 p.m.

                                    <blockquote>
  <p>Are you sure that this is clear code?</p>
</blockquote>

<p>I think, yes for re users, but no for anyone else.</p>

<p>In fact, I'd like to post it to CLEAR or CREATIVE.</p>

                                
                            
                                
                                    CDG.Axel
 on Oct. 15, 2021, 10:03 a.m.

                                    <p>Great idea for 3-line sliding (my solution is 5 or 4 lines only)! Btw:</p>

<pre class='brush: python'>step = (-1) ** (move in 'right down')

return list(map(list, zip(*state)))
</pre>

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