indentation - Python: Comment out a block heading without dedenting all the code inside -

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Sometimes I need to temporarily comment on block headings for testing purpose, for example: 

  i = 2 s = {'a', 'b', 'c'} # timing i & gt; 0: s.pop () i - = 1 print (s)   
 But since the Python is part of the syntax, if I run the code above:    s.pop () ^ indentation error: unexpected indent   
 I know that while dedenting inside code coded   it will work , But I  
 is there any trick to accomplish this?   
 
 
 what about it  if true:  as an alternative? Then just exchange between the '#' between  while  and  if  to get your desired effect.

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