First creative solution for Lightbulb Start Watching by Izabela - python coding challenges

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First solution in Creative category for Lightbulb Start Watching by Izabela

from datetime import datetime


def sum_light(els, start_watching= None) -> int:
    """
    how long the light bulb has been turned on
    """
    deltaSeconds=0
    if start_watching:
        while start_watching>els[0]:
            if els[1]>=start_watching:
                els[0]=start_watching
            elif els[1]
                        Oct. 22, 2021

                        
                            Comments:
                            
                                
                                    CDG.Axel
 on Dec. 8, 2021, 8:11 p.m.

                                    <p>Cool idea with source data shrinking... But you can this about some improvements...</p>

<p>First, you can forget about None as start<em>watching (then you need no if start</em>watching):</p>

<pre class='brush: python'>def sum_light(els, start_watching=datetime.min) -&gt; int:
</pre>

<p>And you need no days + seconds calculations for deltaSeconds:</p>

<pre class='brush: python'>deltaSeconds += (els[i+1]-els[i]).total_seconds()
</pre>

<p>Then you can simplify result calculation (need no deltaSeconds at all):</p>

<pre class='brush: python'>return sum((b - a).total_seconds()) for a, b in zip(els[::2], els[1::2]))
</pre>

<p>And it isn't all optimizations possible!</p>

Master of the Time Stone

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