Python 3's filter and map functions returns an iterator which you
can't call len() on. Since we'll want to use len() later, we put the
filter results into a tuple.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jordan Justen <jordan.l.justen@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>
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