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It is faster to check the existance of a certain library by trying importing that library, instead of invoking pip3 for a complete list of installed libraries. Time of the check can be significantly reduced. # time pip3 list ... real 0m6.038s user 0m0.652s sys 0m0.036s # time python3 -c "import kconfiglib" real 0m0.037s user 0m0.036s sys 0m0.000s Tracked-On: #1588 Signed-off-by: Junjie Mao <junjie.mao@intel.com> Reviewed-by: Anthony Xu <anthony.xu@intel.com>