access hbase thrift2 in python and cant get correct result use filterString

[bingo]

RowFilter(=, 
'regexstring:(?s)^.{4}\\Q\xc4\x98\\E.{1}(?:.{6})*\\Q\x00\x00\x0a\x00\x00\x05\\E(?:.{6})*$')


can match

\x00\x00\x03Y\xC4\x98\xD0\x00\x00\x0A\x00\x00\x05 column=t:[\xC0\x8C1, 
timestamp=1507530755374, value={\x00\xE1\x00


but

RowFilter(=, 
'regexstring:(?s)^.{4}\\Q\xc4\\E.{2}(?:.{6})*\\Q\x00\x00\x0a\x00\x00\x05\\E(?:.{6})*$')


can not match