Flip boolean values list of lists in python -


consider list of lists:

list =[[false, true], [true, false], [ false, false]]

i flip boolean values here , 

flipped_list =[[true,false], [false,true], [true, true]]

i know can loop through each list inside list , [not in child_list] looking efficient of doing without calling for-loop

map(lambda l1: map(lambda x: not x, l1), list)

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