Add manticoresearch search function

5 files changed, 1359 insertions, 0 deletions

diff --git a/README.md b/README.md
index 69d329d..2c69f69 100644
--- a/README.md
+++ b/README.md
@@ -69,3 +69,5 @@ Example search command:
 ```
 curl -X POST '127.0.0.1:8080/search' -d 'index=datas&match=@content livet&select=id&limit=5' --output -
 ```
+
+You can also use the search function of the sphinx module of this project.
diff --git a/config.py b/config.py
index 9df6ddc..f00b52f 100644
--- a/config.py
+++ b/config.py
@@ -7,3 +7,6 @@ DB_HOST = "127.0.0.1"
 DB_PORT = "5432"
 DB_USER = "root"
 DB_PASS = "root"
+
+SPHINX_HOST = '127.0.0.1'
+SPHINX_PORT = 9312
diff --git a/sphinx/__init__.py b/sphinx/__init__.py
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/sphinx/__init__.py
diff --git a/sphinx/sphinx.py b/sphinx/sphinx.py
new file mode 100644
index 0000000..1fffa3e
--- /dev/null
+++ b/sphinx/sphinx.py
@@ -0,0 +1,39 @@
+from .sphinxapi import *
+
+import config
+
+sphinxclient = SphinxClient()
+
+sphinxclient.SetServer(host=config.SPHINX_HOST, port=config.SPHINX_PORT)
+
+def search(request):
+    """
+    Simple sphinx seach function, return a array of all documents matching the
+    search terms.
+    """
+    res = sphinxclient.Query(request)
+
+    opts = {'before_match': '<b>', 'after_match':'</b>', 'chunk_separator': '...', 'limit': 400, 'around': 15}
+    index = 'datas'
+
+    response = []
+
+    if 'matches' in res:
+        n = 1
+        for match in res['matches']:
+            attrsdump = ''
+            for attr in res['attrs']:
+                attrname = attr[0]
+                attrtype = attr[1]
+                if attrname != "content":
+                    value = match['attrs'][attrname]
+                    if attrtype==SPH_ATTR_TIMESTAMP:
+                        value = time.strftime ( '%Y-%m-%d %H:%M:%S', time.localtime(value) )
+                    attrsdump = '%s, \'%s\'=\'%s\'' % ( attrsdump, attrname, value)
+            docs = []
+            docs.append(''.join([line.strip('\n') for line in match['attrs']['content']]))
+            res_excerpts = sphinxclient.BuildExcerpts(index=index, docs=docs, opts=opts, words=request)
+            response.append({'id': match['id'], 'weight': match['weight'], 'url': match['attrs']['url'], 'title': match['attrs']['title'], 'excerpts': res_excerpts})
+            n += 1
+
+    return response
diff --git a/sphinx/sphinxapi.py b/sphinx/sphinxapi.py
new file mode 100644
index 0000000..62a88cb
--- /dev/null
+++ b/sphinx/sphinxapi.py
@@ -0,0 +1,1315 @@
+#
+# $Id$
+#
+# Python version of Sphinx searchd client (Python API)
+#
+# Copyright (c) 2006, Mike Osadnik
+# Copyright (c) 2006-2016, Andrew Aksyonoff
+# Copyright (c) 2008-2016, Sphinx Technologies Inc
+# All rights reserved
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU Library General Public License. You should
+# have received a copy of the LGPL license along with this program; if you
+# did not, you can find it at http://www.gnu.org/
+#
+# WARNING!!!
+#
+# As of 2015, we strongly recommend to use either SphinxQL or REST APIs
+# rather than the native SphinxAPI.
+#
+# While both the native SphinxAPI protocol and the existing APIs will
+# continue to exist, and perhaps should not even break (too much), exposing
+# all the new features via multiple different native API implementations
+# is too much of a support complication for us.
+#
+# That said, you're welcome to overtake the maintenance of any given
+# official API, and remove this warning ;)
+#
+
+from __future__ import print_function
+import sys
+import select
+import socket
+import re
+from struct import *
+
+if sys.version_info > (3,):
+	long = int
+	text_type = str
+else:
+	text_type = unicode
+
+# known searchd commands
+SEARCHD_COMMAND_SEARCH		= 0
+SEARCHD_COMMAND_EXCERPT		= 1
+SEARCHD_COMMAND_UPDATE		= 2
+SEARCHD_COMMAND_KEYWORDS	= 3
+SEARCHD_COMMAND_PERSIST		= 4
+SEARCHD_COMMAND_STATUS		= 5
+SEARCHD_COMMAND_FLUSHATTRS	= 7
+
+# current client-side command implementation versions
+VER_COMMAND_SEARCH		= 0x120
+VER_COMMAND_EXCERPT		= 0x104
+VER_COMMAND_UPDATE		= 0x103
+VER_COMMAND_KEYWORDS	= 0x100
+VER_COMMAND_STATUS		= 0x101
+VER_COMMAND_FLUSHATTRS	= 0x100
+
+# known searchd status codes
+SEARCHD_OK				= 0
+SEARCHD_ERROR			= 1
+SEARCHD_RETRY			= 2
+SEARCHD_WARNING			= 3
+
+# known match modes
+SPH_MATCH_ALL			= 0
+SPH_MATCH_ANY			= 1
+SPH_MATCH_PHRASE		= 2
+SPH_MATCH_BOOLEAN		= 3
+SPH_MATCH_EXTENDED		= 4
+SPH_MATCH_FULLSCAN		= 5
+SPH_MATCH_EXTENDED2		= 6
+
+# known ranking modes (extended2 mode only)
+SPH_RANK_PROXIMITY_BM25	= 0 # default mode, phrase proximity major factor and BM25 minor one
+SPH_RANK_BM25			= 1 # statistical mode, BM25 ranking only (faster but worse quality)
+SPH_RANK_NONE			= 2 # no ranking, all matches get a weight of 1
+SPH_RANK_WORDCOUNT		= 3 # simple word-count weighting, rank is a weighted sum of per-field keyword occurence counts
+SPH_RANK_PROXIMITY		= 4
+SPH_RANK_MATCHANY		= 5
+SPH_RANK_FIELDMASK		= 6
+SPH_RANK_SPH04			= 7
+SPH_RANK_EXPR			= 8
+SPH_RANK_TOTAL			= 9
+
+# known sort modes
+SPH_SORT_RELEVANCE		= 0
+SPH_SORT_ATTR_DESC		= 1
+SPH_SORT_ATTR_ASC		= 2
+SPH_SORT_TIME_SEGMENTS	= 3
+SPH_SORT_EXTENDED		= 4
+SPH_SORT_EXPR			= 5
+
+# known filter types
+SPH_FILTER_VALUES		= 0
+SPH_FILTER_RANGE		= 1
+SPH_FILTER_FLOATRANGE	= 2
+SPH_FILTER_STRING	= 3
+SPH_FILTER_STRING_LIST	= 6
+
+# known attribute types
+SPH_ATTR_NONE			= 0
+SPH_ATTR_INTEGER		= 1
+SPH_ATTR_TIMESTAMP		= 2
+SPH_ATTR_ORDINAL		= 3
+SPH_ATTR_BOOL			= 4
+SPH_ATTR_FLOAT			= 5
+SPH_ATTR_BIGINT			= 6
+SPH_ATTR_STRING			= 7
+SPH_ATTR_FACTORS		= 1001
+SPH_ATTR_MULTI			= long(0X40000001)
+SPH_ATTR_MULTI64		= long(0X40000002)
+
+SPH_ATTR_TYPES = (SPH_ATTR_NONE,
+				  SPH_ATTR_INTEGER,
+				  SPH_ATTR_TIMESTAMP,
+				  SPH_ATTR_ORDINAL,
+				  SPH_ATTR_BOOL,
+				  SPH_ATTR_FLOAT,
+				  SPH_ATTR_BIGINT,
+				  SPH_ATTR_STRING,
+				  SPH_ATTR_MULTI,
+				  SPH_ATTR_MULTI64)
+
+# known grouping functions
+SPH_GROUPBY_DAY	 		= 0
+SPH_GROUPBY_WEEK		= 1
+SPH_GROUPBY_MONTH		= 2
+SPH_GROUPBY_YEAR		= 3
+SPH_GROUPBY_ATTR		= 4
+SPH_GROUPBY_ATTRPAIR	= 5
+
+
+class SphinxClient:
+	def __init__ (self):
+		"""
+		Create a new client object, and fill defaults.
+		"""
+		self._host			= 'localhost'					# searchd host (default is "localhost")
+		self._port			= 9312							# searchd port (default is 9312)
+		self._path			= None							# searchd unix-domain socket path
+		self._socket		= None
+		self._offset		= 0								# how much records to seek from result-set start (default is 0)
+		self._limit			= 20							# how much records to return from result-set starting at offset (default is 20)
+		self._mode			= SPH_MATCH_EXTENDED2					# query matching mode (default is SPH_MATCH_EXTENDED2)
+		self._weights		= []							# per-field weights (default is 1 for all fields)
+		self._sort			= SPH_SORT_RELEVANCE			# match sorting mode (default is SPH_SORT_RELEVANCE)
+		self._sortby		= bytearray()					# attribute to sort by (defualt is "")
+		self._min_id		= 0								# min ID to match (default is 0)
+		self._max_id		= 0								# max ID to match (default is UINT_MAX)
+		self._filters		= []							# search filters
+		self._groupby		= bytearray()					# group-by attribute name
+		self._groupfunc		= SPH_GROUPBY_DAY				# group-by function (to pre-process group-by attribute value with)
+		self._groupsort		= str_bytes('@group desc')		# group-by sorting clause (to sort groups in result set with)
+		self._groupdistinct	= bytearray()					# group-by count-distinct attribute
+		self._maxmatches	= 1000							# max matches to retrieve
+		self._cutoff		= 0								# cutoff to stop searching at
+		self._retrycount	= 0								# distributed retry count
+		self._retrydelay	= 0								# distributed retry delay
+		self._anchor		= {}							# geographical anchor point
+		self._indexweights	= {}							# per-index weights
+		self._ranker		= SPH_RANK_PROXIMITY_BM25		# ranking mode
+		self._rankexpr		= bytearray()					# ranking expression for SPH_RANK_EXPR
+		self._maxquerytime	= 0								# max query time, milliseconds (default is 0, do not limit)
+		self._timeout = 1.0									# connection timeout
+		self._fieldweights	= {}							# per-field-name weights
+		self._overrides		= {}							# per-query attribute values overrides
+		self._select		= str_bytes('*')				# select-list (attributes or expressions, with optional aliases)
+		self._query_flags	= SetBit ( 0, 6, True )			# default idf=tfidf_normalized
+		self._predictedtime = 0								# per-query max_predicted_time
+		self._outerorderby = bytearray()					# outer match sort by
+		self._outeroffset = 0								# outer offset
+		self._outerlimit = 0								# outer limit
+		self._hasouter = False								# sub-select enabled
+		self._tokenfilterlibrary = bytearray()						# token_filter plugin library name
+		self._tokenfiltername = bytearray()						# token_filter plugin name
+		self._tokenfilteropts = bytearray()						# token_filter plugin options
+		
+		self._error			= ''							# last error message
+		self._warning		= ''							# last warning message
+		self._reqs			= []							# requests array for multi-query
+		
+	def __del__ (self):
+		if self._socket:
+			self._socket.close()
+
+
+	def GetLastError (self):
+		"""
+		Get last error message (string).
+		"""
+		return self._error
+
+
+	def GetLastWarning (self):
+		"""
+		Get last warning message (string).
+		"""
+		return self._warning
+
+
+	def SetServer (self, host, port = None):
+		"""
+		Set searchd server host and port.
+		"""
+		assert(isinstance(host, str))
+		if host.startswith('/'):
+			self._path = host
+			return
+		elif host.startswith('unix://'):
+			self._path = host[7:]
+			return
+		self._host = host
+		if isinstance(port, int):
+			assert(port>0 and port<65536)
+			self._port = port
+		self._path = None
+
+	def SetConnectTimeout ( self, timeout ):
+		"""
+		Set connection timeout ( float second )
+		"""
+		assert (isinstance(timeout, float))
+		# set timeout to 0 make connaection non-blocking that is wrong so timeout got clipped to reasonable minimum
+		self._timeout = max ( 0.001, timeout )
+					
+	def _Connect (self):
+		"""
+		INTERNAL METHOD, DO NOT CALL. Connects to searchd server.
+		"""
+		if self._socket:
+			# we have a socket, but is it still alive?
+			sr, sw, _ = select.select ( [self._socket], [self._socket], [], 0 )
+
+			# this is how alive socket should look
+			if len(sr)==0 and len(sw)==1:
+				return self._socket
+
+			# oops, looks like it was closed, lets reopen
+			self._socket.close()
+			self._socket = None
+
+		try:
+			if self._path:
+				af = socket.AF_UNIX
+				addr = self._path
+				desc = self._path
+			else:
+				af = socket.AF_INET
+				addr = ( self._host, self._port )
+				desc = '%s;%s' % addr
+			sock = socket.socket ( af, socket.SOCK_STREAM )
+			sock.settimeout ( self._timeout )
+			sock.connect ( addr )
+		except socket.error as msg:
+			if sock:
+				sock.close()
+			self._error = 'connection to %s failed (%s)' % ( desc, msg )
+			return
+
+		v = unpack('>L', sock.recv(4))[0]
+		if v<1:
+			sock.close()
+			self._error = 'expected searchd protocol version, got %s' % v
+			return
+
+		# all ok, send my version
+		sock.send(pack('>L', 1))
+		return sock
+
+
+	def _GetResponse (self, sock, client_ver):
+		"""
+		INTERNAL METHOD, DO NOT CALL. Gets and checks response packet from searchd server.
+		"""
+		(status, ver, length) = unpack('>2HL', sock.recv(8))
+		response = bytearray()
+		left = length
+		while left>0:
+			chunk = sock.recv(left)
+			if chunk:
+				response += chunk
+				left -= len(chunk)
+			else:
+				break
+
+		if not self._socket:
+			sock.close()
+
+		# check response
+		read = len(response)
+		if not response or read!=length:
+			if length:
+				self._error = 'failed to read searchd response (status=%s, ver=%s, len=%s, read=%s)' \
+					% (status, ver, length, read)
+			else:
+				self._error = 'received zero-sized searchd response'
+			return None
+
+		# check status
+		if status==SEARCHD_WARNING:
+			wend = 4 + unpack ( '>L', response[0:4] )[0]
+			self._warning = bytes_str(response[4:wend])
+			return response[wend:]
+
+		if status==SEARCHD_ERROR:
+			self._error = 'searchd error: ' + bytes_str(response[4:])
+			return None
+
+		if status==SEARCHD_RETRY:
+			self._error = 'temporary searchd error: ' + bytes_str(response[4:])
+			return None
+
+		if status!=SEARCHD_OK:
+			self._error = 'unknown status code %d' % status
+			return None
+
+		# check version
+		if ver<client_ver:
+			self._warning = 'searchd command v.%d.%d older than client\'s v.%d.%d, some options might not work' \
+				% (ver>>8, ver&0xff, client_ver>>8, client_ver&0xff)
+
+		return response
+
+
+	def _Send ( self, sock, req ):
+		"""
+		INTERNAL METHOD, DO NOT CALL. send request to searchd server.
+		"""
+		total = 0
+		while True:
+			sent = sock.send ( req[total:] )
+			if sent<=0:
+				break
+				
+			total = total + sent
+		
+		return total
+		
+
+	def SetLimits (self, offset, limit, maxmatches=0, cutoff=0):
+		"""
+		Set offset and count into result set, and optionally set max-matches and cutoff limits.
+		"""
+		assert ( type(offset) in [int,long] and 0<=offset<16777216 )
+		assert ( type(limit) in [int,long] and 0<limit<16777216 )
+		assert(maxmatches>=0)
+		self._offset = offset
+		self._limit = limit
+		if maxmatches>0:
+			self._maxmatches = maxmatches
+		if cutoff>=0:
+			self._cutoff = cutoff
+
+
+	def SetMaxQueryTime (self, maxquerytime):
+		"""
+		Set maximum query time, in milliseconds, per-index. 0 means 'do not limit'.
+		"""
+		assert(isinstance(maxquerytime,int) and maxquerytime>0)
+		self._maxquerytime = maxquerytime
+
+
+	def SetMatchMode (self, mode):
+		"""
+		Set matching mode.
+		"""
+		print('DEPRECATED: Do not call this method or, even better, use SphinxQL instead of an API', file=sys.stderr)
+		assert(mode in [SPH_MATCH_ALL, SPH_MATCH_ANY, SPH_MATCH_PHRASE, SPH_MATCH_BOOLEAN, SPH_MATCH_EXTENDED, SPH_MATCH_FULLSCAN, SPH_MATCH_EXTENDED2])
+		self._mode = mode
+
+
+	def SetRankingMode ( self, ranker, rankexpr='' ):
+		"""
+		Set ranking mode.
+		"""
+		assert(ranker>=0 and ranker<SPH_RANK_TOTAL)
+		self._ranker = ranker
+		self._rankexpr = str_bytes(rankexpr)
+
+
+	def SetSortMode ( self, mode, clause='' ):
+		"""
+		Set sorting mode.
+		"""
+		assert ( mode in [SPH_SORT_RELEVANCE, SPH_SORT_ATTR_DESC, SPH_SORT_ATTR_ASC, SPH_SORT_TIME_SEGMENTS, SPH_SORT_EXTENDED, SPH_SORT_EXPR] )
+		assert ( isinstance ( clause, (str,text_type) ) )
+		self._sort = mode
+		self._sortby = str_bytes(clause)
+
+
+	def SetFieldWeights (self, weights):
+		"""
+		Bind per-field weights by name; expects (name,field_weight) dictionary as argument.
+		"""
+		assert(isinstance(weights,dict))
+		for key,val in list(weights.items()):
+			assert(isinstance(key,str))
+			AssertUInt32 ( val )
+		self._fieldweights = weights
+
+
+	def SetIndexWeights (self, weights):
+		"""
+		Bind per-index weights by name; expects (name,index_weight) dictionary as argument.
+		"""
+		assert(isinstance(weights,dict))
+		for key,val in list(weights.items()):
+			assert(isinstance(key,str))
+			AssertUInt32(val)
+		self._indexweights = weights
+
+
+	def SetIDRange (self, minid, maxid):
+		"""
+		Set IDs range to match.
+		Only match records if document ID is beetwen $min and $max (inclusive).
+		"""
+		assert(isinstance(minid, (int, long)))
+		assert(isinstance(maxid, (int, long)))
+		assert(minid<=maxid)
+		self._min_id = minid
+		self._max_id = maxid
+
+
+	def SetFilter ( self, attribute, values, exclude=0 ):
+		"""
+		Set values set filter.
+		Only match records where 'attribute' value is in given 'values' set.
+		"""
+		assert(isinstance(attribute, str))
+		assert iter(values)
+
+		for value in values:
+			AssertInt32 ( value )
+
+		self._filters.append ( { 'type':SPH_FILTER_VALUES, 'attr':attribute, 'exclude':exclude, 'values':values } )
+
+		
+	def SetFilterString ( self, attribute, value, exclude=0 ):
+		"""
+		Set string filter.
+		Only match records where 'attribute' value is equal
+		"""
+		assert(isinstance(attribute, str))
+		assert(isinstance(value, str))
+
+		
+		self._filters.append ( { 'type':SPH_FILTER_STRING, 'attr':attribute, 'exclude':exclude, 'value':value } )
+
+		
+	def SetFilterStringList ( self, attribute, value, exclude=0 ):
+		"""
+		Set string list filter.
+		"""
+		assert(isinstance(attribute, str))
+		assert(iter(value))
+
+		for v in value:
+			assert(isinstance(v, str))
+		
+		self._filters.append ( { 'type':SPH_FILTER_STRING_LIST, 'attr':attribute, 'exclude':exclude, 'values':value } )
+		
+
+	def SetFilterRange (self, attribute, min_, max_, exclude=0 ):
+		"""
+		Set range filter.
+		Only match records if 'attribute' value is beetwen 'min_' and 'max_' (inclusive).
+		"""
+		assert(isinstance(attribute, str))
+		AssertInt32(min_)
+		AssertInt32(max_)
+		assert(min_<=max_)
+
+		self._filters.append ( { 'type':SPH_FILTER_RANGE, 'attr':attribute, 'exclude':exclude, 'min':min_, 'max':max_ } )
+
+
+	def SetFilterFloatRange (self, attribute, min_, max_, exclude=0 ):
+		assert(isinstance(attribute,str))
+		assert(isinstance(min_,float))
+		assert(isinstance(max_,float))
+		assert(min_ <= max_)
+		self._filters.append ( {'type':SPH_FILTER_FLOATRANGE, 'attr':attribute, 'exclude':exclude, 'min':min_, 'max':max_} ) 
+
+
+	def SetGeoAnchor (self, attrlat, attrlong, latitude, longitude):
+		assert(isinstance(attrlat,str))
+		assert(isinstance(attrlong,str))
+		assert(isinstance(latitude,float))
+		assert(isinstance(longitude,float))
+		self._anchor['attrlat'] = attrlat
+		self._anchor['attrlong'] = attrlong
+		self._anchor['lat'] = latitude
+		self._anchor['long'] = longitude
+
+
+	def SetGroupBy ( self, attribute, func, groupsort='@group desc' ):
+		"""
+		Set grouping attribute and function.
+		"""
+		assert(isinstance(attribute, (str,text_type)))
+		assert(func in [SPH_GROUPBY_DAY, SPH_GROUPBY_WEEK, SPH_GROUPBY_MONTH, SPH_GROUPBY_YEAR, SPH_GROUPBY_ATTR, SPH_GROUPBY_ATTRPAIR] )
+		assert(isinstance(groupsort, (str,text_type)))
+
+		self._groupby = str_bytes(attribute)
+		self._groupfunc = func
+		self._groupsort = str_bytes(groupsort)
+
+
+	def SetGroupDistinct (self, attribute):
+		assert(isinstance(attribute,(str,text_type)))
+		self._groupdistinct = str_bytes(attribute)
+
+
+	def SetRetries (self, count, delay=0):
+		assert(isinstance(count,int) and count>=0)
+		assert(isinstance(delay,int) and delay>=0)
+		self._retrycount = count
+		self._retrydelay = delay
+
+
+	def SetOverride (self, name, type, values):
+		print('DEPRECATED: Do not call this method. Use SphinxQL REMAP() function instead.', file=sys.stderr)
+		assert(isinstance(name, str))
+		assert(type in SPH_ATTR_TYPES)
+		assert(isinstance(values, dict))
+
+		self._overrides[name] = {'name': name, 'type': type, 'values': values}
+
+	def SetSelect (self, select):
+		assert(isinstance(select, (str,text_type)))
+		self._select = str_bytes(select)
+
+	def SetQueryFlag ( self, name, value ):
+		known_names = [ "reverse_scan", "sort_method", "max_predicted_time", "boolean_simplify", "idf", "global_idf" ]
+		flags = { "reverse_scan":[0, 1], "sort_method":["pq", "kbuffer"],"max_predicted_time":[0], "boolean_simplify":[True, False], "idf":["normalized", "plain", "tfidf_normalized", "tfidf_unnormalized"], "global_idf":[True, False] }
+		assert ( name in known_names )
+		assert ( value in flags[name] or ( name=="max_predicted_time" and isinstance(value, (int, long)) and value>=0))
+		
+		if name=="reverse_scan":
+			self._query_flags = SetBit ( self._query_flags, 0, value==1 )
+		if name=="sort_method":
+			self._query_flags = SetBit ( self._query_flags, 1, value=="kbuffer" )
+		if name=="max_predicted_time":
+			self._query_flags = SetBit ( self._query_flags, 2, value>0 )
+			self._predictedtime = int(value)
+		if name=="boolean_simplify":
+			self._query_flags= SetBit ( self._query_flags, 3, value )
+		if name=="idf" and ( value=="plain" or value=="normalized" ) :
+			self._query_flags = SetBit ( self._query_flags, 4, value=="plain" )
+		if name=="global_idf":
+			self._query_flags= SetBit ( self._query_flags, 5, value )
+		if name=="idf" and ( value=="tfidf_normalized" or value=="tfidf_unnormalized" ) :
+			self._query_flags = SetBit ( self._query_flags, 6, value=="tfidf_normalized" )
+
+	def SetOuterSelect ( self, orderby, offset, limit ):
+		assert(isinstance(orderby, (str,text_type)))
+		assert(isinstance(offset, (int, long)))
+		assert(isinstance(limit, (int, long)))
+		assert ( offset>=0 )
+		assert ( limit>0 )
+
+		self._outerorderby = str_bytes(orderby)
+		self._outeroffset = offset
+		self._outerlimit = limit
+		self._hasouter = True
+
+	def SetTokenFilter ( self, library, name, opts='' ):
+		assert(isinstance(library, str))
+		assert(isinstance(name, str))
+		assert(isinstance(opts, str))
+
+		self._tokenfilterlibrary = str_bytes(library)
+		self._tokenfiltername = str_bytes(name)
+		self._tokenfilteropts = str_bytes(opts)
+		
+	def ResetOverrides (self):
+		self._overrides = {}
+
+
+	def ResetFilters (self):
+		"""
+		Clear all filters (for multi-queries).
+		"""
+		self._filters = []
+		self._anchor = {}
+
+
+	def ResetGroupBy (self):
+		"""
+		Clear groupby settings (for multi-queries).
+		"""
+		self._groupby = bytearray()
+		self._groupfunc = SPH_GROUPBY_DAY
+		self._groupsort = str_bytes('@group desc')
+		self._groupdistinct = bytearray()
+
+	def ResetQueryFlag (self):
+		self._query_flags = SetBit ( 0, 6, True ) # default idf=tfidf_normalized
+		self._predictedtime = 0
+		
+	def ResetOuterSelect (self):
+		self._outerorderby = bytearray()
+		self._outeroffset = 0
+		self._outerlimit = 0
+		self._hasouter = False
+
+	def Query (self, query, index='*', comment=''):
+		"""
+		Connect to searchd server and run given search query.
+		Returns None on failure; result set hash on success (see documentation for details).
+		"""
+		assert(len(self._reqs)==0)
+		self.AddQuery(query,index,comment)
+		results = self.RunQueries()
+		self._reqs = [] # we won't re-run erroneous batch
+
+		if not results or len(results)==0:
+			return None
+		self._error = results[0]['error']
+		self._warning = results[0]['warning']
+		if results[0]['status'] == SEARCHD_ERROR:
+			return None
+		return results[0]
+
+
+	def AddQuery (self, query, index='*', comment=''):
+		"""
+		Add query to batch.
+		"""
+		# build request
+		req = bytearray()
+		req.extend(pack('>5L', self._query_flags, self._offset, self._limit, self._mode, self._ranker))
+		if self._ranker==SPH_RANK_EXPR:
+			req.extend(pack('>L', len(self._rankexpr)))
+			req.extend(self._rankexpr)
+		req.extend(pack('>L', self._sort))
+		req.extend(pack('>L', len(self._sortby)))
+		req.extend(self._sortby)
+
+		query = str_bytes(query)
+		assert(isinstance(query,bytearray))
+
+		req.extend(pack('>L', len(query)))
+		req.extend(query)
+
+		req.extend(pack('>L', len(self._weights)))
+		for w in self._weights:
+			req.extend(pack('>L', w))
+		index = str_bytes(index)
+		assert(isinstance(index,bytearray))
+		req.extend(pack('>L', len(index)))
+		req.extend(index)
+		req.extend(pack('>L',1)) # id64 range marker
+		req.extend(pack('>Q', self._min_id))
+		req.extend(pack('>Q', self._max_id))
+		
+		# filters
+		req.extend ( pack ( '>L', len(self._filters) ) )
+		for f in self._filters:
+			attr = str_bytes(f['attr'])
+			req.extend ( pack ( '>L', len(f['attr'])) + attr)
+			filtertype = f['type']
+			req.extend ( pack ( '>L', filtertype))
+			if filtertype == SPH_FILTER_VALUES:
+				req.extend ( pack ('>L', len(f['values'])))
+				for val in f['values']:
+					req.extend ( pack ('>q', val))
+			elif filtertype == SPH_FILTER_RANGE:
+				req.extend ( pack ('>2q', f['min'], f['max']))
+			elif filtertype == SPH_FILTER_FLOATRANGE:
+				req.extend ( pack ('>2f', f['min'], f['max']))
+			elif filtertype == SPH_FILTER_STRING:
+				val = str_bytes(f['value'])
+				req.extend ( pack ( '>L', len(val) ) )
+				req.extend ( val )
+			elif filtertype == SPH_FILTER_STRING_LIST:
+				req.extend ( pack ('>L', len(f['values'])))
+				for sval in f['values']:
+					val = str_bytes( sval )
+					req.extend ( pack ( '>L', len(val) ) )
+					req.extend(val)
+			req.extend ( pack ( '>L', f['exclude'] ) )
+
+		# group-by, max-matches, group-sort
+		req.extend ( pack ( '>2L', self._groupfunc, len(self._groupby) ) )
+		req.extend ( self._groupby )
+		req.extend ( pack ( '>2L', self._maxmatches, len(self._groupsort) ) )
+		req.extend ( self._groupsort )
+		req.extend ( pack ( '>LLL', self._cutoff, self._retrycount, self._retrydelay))
+		req.extend ( pack ( '>L', len(self._groupdistinct)))
+		req.extend ( self._groupdistinct)
+
+		# anchor point
+		if len(self._anchor) == 0:
+			req.extend ( pack ('>L', 0))
+		else:
+			attrlat, attrlong = str_bytes(self._anchor['attrlat']), str_bytes(self._anchor['attrlong'])
+			latitude, longitude = self._anchor['lat'], self._anchor['long']
+			req.extend ( pack ('>L', 1))
+			req.extend ( pack ('>L', len(attrlat)) + attrlat)
+			req.extend ( pack ('>L', len(attrlong)) + attrlong)
+			req.extend ( pack ('>f', latitude) + pack ('>f', longitude))
+
+		# per-index weights
+		req.extend ( pack ('>L',len(self._indexweights)))
+		for indx,weight in list(self._indexweights.items()):
+			indx = str_bytes(indx)
+			req.extend ( pack ('>L',len(indx)) + indx + pack ('>L',weight))
+
+		# max query time
+		req.extend ( pack ('>L', self._maxquerytime) )
+
+		# per-field weights
+		req.extend ( pack ('>L',len(self._fieldweights) ) )
+		for field,weight in list(self._fieldweights.items()):
+			field = str_bytes(field)
+			req.extend ( pack ('>L',len(field)) + field + pack ('>L',weight) )
+
+		# comment
+		comment = str_bytes(comment)
+		req.extend ( pack('>L',len(comment)) + comment )
+
+		# attribute overrides
+		req.extend ( pack('>L', len(self._overrides)) )
+		for v in list(self._overrides.values()):
+			name = str_bytes(v['name'])
+			req.extend ( ( pack('>L', len(name)), name ) )
+			req.extend ( pack('>LL', v['type'], len(v['values'])) )
+			for id, value in v['values'].items():
+				req.extend ( pack('>Q', id) )
+				if v['type'] == SPH_ATTR_FLOAT:
+					req.extend ( pack('>f', value) )
+				elif v['type'] == SPH_ATTR_BIGINT:
+					req.extend ( pack('>q', value) )
+				else:
+					req.extend ( pack('>l', value) )
+
+		# select-list
+		req.extend ( pack('>L', len(self._select)) )
+		req.extend ( self._select )
+		if self._predictedtime>0:
+			req.extend ( pack('>L', self._predictedtime ) )
+
+		# outer
+		req.extend ( pack('>L',len(self._outerorderby)) + self._outerorderby )
+		req.extend ( pack ( '>2L', self._outeroffset, self._outerlimit ) )
+		if self._hasouter:
+			req.extend ( pack('>L', 1) )
+		else:
+			req.extend ( pack('>L', 0) )
+
+		# token_filter
+		req.extend ( pack('>L',len(self._tokenfilterlibrary)) + self._tokenfilterlibrary )
+		req.extend ( pack('>L',len(self._tokenfiltername)) + self._tokenfiltername )
+		req.extend ( pack('>L',len(self._tokenfilteropts)) + self._tokenfilteropts )
+			
+		# send query, get response
+
+		self._reqs.append(req)
+		return
+
+
+	def RunQueries (self):
+		"""
+		Run queries batch.
+		Returns None on network IO failure; or an array of result set hashes on success.
+		"""
+		if len(self._reqs)==0:
+			self._error = 'no queries defined, issue AddQuery() first'
+			return None
+
+		sock = self._Connect()
+		if not sock:
+			return None
+
+		req = bytearray()
+		for r in self._reqs:
+			req.extend(r)
+		length = len(req)+8
+		req_all = bytearray()
+		req_all.extend(pack('>HHLLL', SEARCHD_COMMAND_SEARCH, VER_COMMAND_SEARCH, length, 0, len(self._reqs)))
+		req_all.extend(req)
+		self._Send ( sock, req_all )
+
+		response = self._GetResponse(sock, VER_COMMAND_SEARCH)
+		if not response:
+			return None
+
+		nreqs = len(self._reqs)
+
+		# parse response
+		max_ = len(response)
+		p = 0
+
+		results = []
+		for i in range(0,nreqs,1):
+			result = {}
+			results.append(result)
+
+			result['error'] = ''
+			result['warning'] = ''
+			status = unpack('>L', response[p:p+4])[0]
+			p += 4
+			result['status'] = status
+			if status != SEARCHD_OK:
+				length = unpack('>L', response[p:p+4])[0]
+				p += 4
+				message = bytes_str(response[p:p+length])
+				p += length
+
+				if status == SEARCHD_WARNING:
+					result['warning'] = message
+				else:
+					result['error'] = message
+					continue
+
+			# read schema
+			fields = []
+			attrs = []
+
+			nfields = unpack('>L', response[p:p+4])[0]
+			p += 4
+			while nfields>0 and p<max_:
+				nfields -= 1
+				length = unpack('>L', response[p:p+4])[0]
+				p += 4
+				fields.append(bytes_str(response[p:p+length]))
+				p += length
+
+			result['fields'] = fields
+
+			nattrs = unpack('>L', response[p:p+4])[0]
+			p += 4
+			while nattrs>0 and p<max_:
+				nattrs -= 1
+				length = unpack('>L', response[p:p+4])[0]
+				p += 4
+				attr = bytes_str(response[p:p+length])
+				p += length
+				type_ = unpack('>L', response[p:p+4])[0]
+				p += 4
+				attrs.append([attr,type_])
+
+			result['attrs'] = attrs
+
+			# read match count
+			count = unpack('>L', response[p:p+4])[0]
+			p += 4
+			id64 = unpack('>L', response[p:p+4])[0]
+			p += 4
+		
+			# read matches
+			result['matches'] = []
+			while count>0 and p<max_:
+				count -= 1
+				if id64:
+					doc, weight = unpack('>QL', response[p:p+12])
+					p += 12
+				else:
+					doc, weight = unpack('>2L', response[p:p+8])
+					p += 8
+
+				match = { 'id':doc, 'weight':weight, 'attrs':{} }
+				for i in range(len(attrs)):
+					if attrs[i][1] == SPH_ATTR_FLOAT:
+						match['attrs'][attrs[i][0]] = unpack('>f', response[p:p+4])[0]
+					elif attrs[i][1] == SPH_ATTR_BIGINT:
+						match['attrs'][attrs[i][0]] = unpack('>q', response[p:p+8])[0]
+						p += 4
+					elif attrs[i][1] == SPH_ATTR_STRING:
+						slen = unpack('>L', response[p:p+4])[0]
+						p += 4
+						match['attrs'][attrs[i][0]] = ''
+						if slen>0:
+							match['attrs'][attrs[i][0]] = bytes_str(response[p:p+slen])
+						p += slen-4
+					elif attrs[i][1] == SPH_ATTR_FACTORS:
+						slen = unpack('>L', response[p:p+4])[0]
+						p += 4
+						match['attrs'][attrs[i][0]] = ''
+						if slen>0:
+							match['attrs'][attrs[i][0]] = response[p:p+slen-4]
+							p += slen-4
+						p -= 4
+					elif attrs[i][1] == SPH_ATTR_MULTI:
+						match['attrs'][attrs[i][0]] = []
+						nvals = unpack('>L', response[p:p+4])[0]
+						p += 4
+						for n in range(0,nvals,1):
+							match['attrs'][attrs[i][0]].append(unpack('>L', response[p:p+4])[0])
+							p += 4
+						p -= 4
+					elif attrs[i][1] == SPH_ATTR_MULTI64:
+						match['attrs'][attrs[i][0]] = []
+						nvals = unpack('>L', response[p:p+4])[0]
+						nvals = nvals/2
+						p += 4
+						for n in range(0,nvals,1):
+							match['attrs'][attrs[i][0]].append(unpack('>q', response[p:p+8])[0])
+							p += 8
+						p -= 4
+					else:
+						match['attrs'][attrs[i][0]] = unpack('>L', response[p:p+4])[0]
+					p += 4
+
+				result['matches'].append ( match )
+
+			result['total'], result['total_found'], result['time'], words = unpack('>4L', response[p:p+16])
+
+			result['time'] = '%.3f' % (result['time']/1000.0)
+			p += 16
+
+			result['words'] = []
+			while words>0:
+				words -= 1
+				length = unpack('>L', response[p:p+4])[0]
+				p += 4
+				word = bytes_str(response[p:p+length])
+				p += length
+				docs, hits = unpack('>2L', response[p:p+8])
+				p += 8
+
+				result['words'].append({'word':word, 'docs':docs, 'hits':hits})
+		
+		self._reqs = []
+		return results
+	
+
+	def BuildExcerpts (self, docs, index, words, opts=None):
+		"""
+		Connect to searchd server and generate exceprts from given documents.
+		"""
+		if not opts:
+			opts = {}
+
+		assert(isinstance(docs, list))
+		assert(isinstance(index, (str,text_type)))
+		assert(isinstance(words, (str,text_type)))
+		assert(isinstance(opts, dict))
+
+		sock = self._Connect()
+
+		if not sock:
+			return None
+
+		# fixup options
+		opts.setdefault('before_match', '<b>')
+		opts.setdefault('after_match', '</b>')
+		opts.setdefault('chunk_separator', ' ... ')
+		opts.setdefault('html_strip_mode', 'index')
+		opts.setdefault('limit', 256)
+		opts.setdefault('limit_passages', 0)
+		opts.setdefault('limit_words', 0)
+		opts.setdefault('around', 5)
+		opts.setdefault('start_passage_id', 1)
+		opts.setdefault('passage_boundary', 'none')
+
+		# build request
+		# v.1.0 req
+
+		flags = 1 # (remove spaces)
+		if opts.get('exact_phrase'):	flags |= 2
+		if opts.get('single_passage'):	flags |= 4
+		if opts.get('use_boundaries'):	flags |= 8
+		if opts.get('weight_order'):	flags |= 16
+		if opts.get('query_mode'):		flags |= 32
+		if opts.get('force_all_words'):	flags |= 64
+		if opts.get('load_files'):		flags |= 128
+		if opts.get('allow_empty'):		flags |= 256
+		if opts.get('emit_zones'):		flags |= 512
+		if opts.get('load_files_scattered'):	flags |= 1024
+		
+		# mode=0, flags
+		req = bytearray()
+		req.extend(pack('>2L', 0, flags))
+
+		# req index
+		index = str_bytes(index)
+		req.extend(pack('>L', len(index)))
+		req.extend(index)
+
+		# req words
+		words = str_bytes(words)
+		req.extend(pack('>L', len(words)))
+		req.extend(words)
+
+		# options
+		opts_before_match = str_bytes(opts['before_match'])
+		req.extend(pack('>L', len(opts_before_match)))
+		req.extend(opts_before_match)
+
+		opts_after_match = str_bytes(opts['after_match'])
+		req.extend(pack('>L', len(opts_after_match)))
+		req.extend(opts_after_match)
+
+		opts_chunk_separator = str_bytes(opts['chunk_separator'])
+		req.extend(pack('>L', len(opts_chunk_separator)))
+		req.extend(opts_chunk_separator)
+
+		req.extend(pack('>L', int(opts['limit'])))
+		req.extend(pack('>L', int(opts['around'])))
+		
+		req.extend(pack('>L', int(opts['limit_passages'])))
+		req.extend(pack('>L', int(opts['limit_words'])))
+		req.extend(pack('>L', int(opts['start_passage_id'])))
+		opts_html_strip_mode = str_bytes(opts['html_strip_mode'])
+		req.extend(pack('>L', len(opts_html_strip_mode)))
+		req.extend(opts_html_strip_mode)
+		opts_passage_boundary = str_bytes(opts['passage_boundary'])
+		req.extend(pack('>L', len(opts_passage_boundary)))
+		req.extend(opts_passage_boundary)
+
+		# documents
+		req.extend(pack('>L', len(docs)))
+		for doc in docs:
+			doc = str_bytes(doc)
+			req.extend(pack('>L', len(doc)))
+			req.extend(doc)
+
+		# send query, get response
+		length = len(req)
+
+		# add header
+		req_head = bytearray()
+		req_head.extend(pack('>2HL', SEARCHD_COMMAND_EXCERPT, VER_COMMAND_EXCERPT, length))
+		req_all = req_head + req
+		self._Send ( sock, req_all )
+
+		response = self._GetResponse(sock, VER_COMMAND_EXCERPT )
+		if not response:
+			return []
+
+		# parse response
+		pos = 0
+		res = []
+		rlen = len(response)
+
+		for i in range(len(docs)):
+			length = unpack('>L', response[pos:pos+4])[0]
+			pos += 4
+
+			if pos+length > rlen:
+				self._error = 'incomplete reply'
+				return []
+
+			res.append(bytes_str(response[pos:pos+length]))
+			pos += length
+
+		return res
+
+
+	def UpdateAttributes ( self, index, attrs, values, mva=False, ignorenonexistent=False ):
+		"""
+		Update given attribute values on given documents in given indexes.
+		Returns amount of updated documents (0 or more) on success, or -1 on failure.
+
+		'attrs' must be a list of strings.
+		'values' must be a dict with int key (document ID) and list of int values (new attribute values).
+		optional boolean parameter 'mva' points that there is update of MVA attributes.
+		In this case the 'values' must be a dict with int key (document ID) and list of lists of int values
+		(new MVA attribute values).
+		Optional boolean parameter 'ignorenonexistent' points that the update will silently ignore any warnings about
+		trying to update a column which is not exists in current index schema.
+
+		Example:
+			res = cl.UpdateAttributes ( 'test1', [ 'group_id', 'date_added' ], { 2:[123,1000000000], 4:[456,1234567890] } )
+		"""
+		assert ( isinstance ( index, str ) )
+		assert ( isinstance ( attrs, list ) )
+		assert ( isinstance ( values, dict ) )
+		for attr in attrs:
+			assert ( isinstance ( attr, str ) )
+		for docid, entry in list(values.items()):
+			AssertUInt32(docid)
+			assert ( isinstance ( entry, list ) )
+			assert ( len(attrs)==len(entry) )
+			for val in entry:
+				if mva:
+					assert ( isinstance ( val, list ) )
+					for vals in val:
+						AssertInt32(vals)
+				else:
+					AssertInt32(val)
+
+		# build request
+		req = bytearray()
+		index = str_bytes(index)
+		req.extend( pack('>L',len(index)) + index )
+
+		req.extend ( pack('>L',len(attrs)) )
+		ignore_absent = 0
+		if ignorenonexistent: ignore_absent = 1
+		req.extend ( pack('>L', ignore_absent ) )
+		mva_attr = 0
+		if mva: mva_attr = 1
+		for attr in attrs:
+			attr = str_bytes(attr)
+			req.extend ( pack('>L',len(attr)) + attr )
+			req.extend ( pack('>L', mva_attr ) )
+
+		req.extend ( pack('>L',len(values)) )
+		for docid, entry in list(values.items()):
+			req.extend ( pack('>Q',docid) )
+			for val in entry:
+				val_len = val
+				if mva: val_len = len ( val )
+				req.extend ( pack('>L',val_len ) )
+				if mva:
+					for vals in val:
+						req.extend ( pack ('>L',vals) )
+
+		# connect, send query, get response
+		sock = self._Connect()
+		if not sock:
+			return None
+
+		length = len(req)
+		req_all = bytearray()
+		req_all.extend( pack ( '>2HL', SEARCHD_COMMAND_UPDATE, VER_COMMAND_UPDATE, length ) )
+		req_all.extend( req )
+		self._Send ( sock, req_all )
+
+		response = self._GetResponse ( sock, VER_COMMAND_UPDATE )
+		if not response:
+			return -1
+
+		# parse response
+		updated = unpack ( '>L', response[0:4] )[0]
+		return updated
+
+
+	def BuildKeywords ( self, query, index, hits ):
+		"""
+		Connect to searchd server, and generate keywords list for a given query.
+		Returns None on failure, or a list of keywords on success.
+		"""
+		assert ( isinstance ( query, str ) )
+		assert ( isinstance ( index, str ) )
+		assert ( isinstance ( hits, int ) )
+
+		# build request
+		req = bytearray()
+		query = str_bytes(query)
+		req.extend(pack ( '>L', len(query) ) + query)
+		index = str_bytes(index)
+		req.extend ( pack ( '>L', len(index) ) + index )
+		req.extend ( pack ( '>L', hits ) )
+
+		# connect, send query, get response
+		sock = self._Connect()
+		if not sock:
+			return None
+
+		length = len(req)
+		req_all = bytearray()
+		req_all.extend(pack ( '>2HL', SEARCHD_COMMAND_KEYWORDS, VER_COMMAND_KEYWORDS, length ))
+		req_all.extend(req)
+		self._Send ( sock, req_all )
+
+		response = self._GetResponse ( sock, VER_COMMAND_KEYWORDS )
+		if not response:
+			return None
+
+		# parse response
+		res = []
+
+		nwords = unpack ( '>L', response[0:4] )[0]
+		p = 4
+		max_ = len(response)
+
+		while nwords>0 and p<max_:
+			nwords -= 1
+
+			length = unpack ( '>L', response[p:p+4] )[0]
+			p += 4
+			tokenized = response[p:p+length]
+			p += length
+
+			length = unpack ( '>L', response[p:p+4] )[0]
+			p += 4
+			normalized = response[p:p+length]
+			p += length
+
+			entry = { 'tokenized':bytes_str(tokenized), 'normalized':bytes_str(normalized) }
+			if hits:
+				entry['docs'], entry['hits'] = unpack ( '>2L', response[p:p+8] )
+				p += 8
+
+			res.append ( entry )
+
+		if nwords>0 or p>max_:
+			self._error = 'incomplete reply'
+			return None
+
+		return res
+
+	def Status ( self, session=False ):
+		"""
+		Get the status
+		"""
+
+		# connect, send query, get response
+		sock = self._Connect()
+		if not sock:
+			return None
+
+		sess = 1
+		if session:
+			sess = 0
+
+		req = pack ( '>2HLL', SEARCHD_COMMAND_STATUS, VER_COMMAND_STATUS, 4, sess )
+		self._Send ( sock, req )
+
+		response = self._GetResponse ( sock, VER_COMMAND_STATUS )
+		if not response:
+			return None
+
+		# parse response
+		res = []
+
+		p = 8
+		max_ = len(response)
+
+		while p<max_:
+			length = unpack ( '>L', response[p:p+4] )[0]
+			k = response[p+4:p+length+4]
+			p += 4+length
+			length = unpack ( '>L', response[p:p+4] )[0]
+			v = response[p+4:p+length+4]
+			p += 4+length
+			res += [[bytes_str(k), bytes_str(v)]]
+
+		return res
+
+	### persistent connections
+
+	def Open(self):
+		if self._socket:
+			self._error = 'already connected'
+			return None
+		
+		server = self._Connect()
+		if not server:
+			return None
+
+		# command, command version = 0, body length = 4, body = 1
+		request = pack ( '>hhII', SEARCHD_COMMAND_PERSIST, 0, 4, 1 )
+		self._Send ( server, request )
+		
+		self._socket = server
+		return True
+
+	def Close(self):
+		if not self._socket:
+			self._error = 'not connected'
+			return
+		self._socket.close()
+		self._socket = None
+	
+	def EscapeString(self, string):
+		return re.sub(r"([=\(\)|\-!@~\"&/\\\^\$\=\<])", r"\\\1", string)
+
+
+	def FlushAttributes(self):
+		sock = self._Connect()
+		if not sock:
+			return -1
+
+		request = pack ( '>hhI', SEARCHD_COMMAND_FLUSHATTRS, VER_COMMAND_FLUSHATTRS, 0 ) # cmd, ver, bodylen
+		self._Send ( sock, request )
+
+		response = self._GetResponse ( sock, VER_COMMAND_FLUSHATTRS )
+		if not response or len(response)!=4:
+			self._error = 'unexpected response length'
+			return -1
+
+		tag = unpack ( '>L', response[0:4] )[0]
+		return tag
+
+def AssertInt32 ( value ):
+	assert(isinstance(value, (int, long)))
+	assert(value>=-2**32-1 and value<=2**32-1)
+
+def AssertUInt32 ( value ):
+	assert(isinstance(value, (int, long)))
+	assert(value>=0 and value<=2**32-1)
+
+def SetBit ( flag, bit, on ):
+	if on:
+		flag += ( 1<<bit )
+	else:
+		reset = 255 ^ ( 1<<bit )
+		flag = flag & reset
+
+	return flag
+
+if sys.version_info > (3,):
+	def str_bytes(x):
+		return bytearray(x, 'utf-8')
+else:
+	def str_bytes(x):
+		if isinstance(x,unicode):
+			return bytearray(x, 'utf-8')
+		else:
+			return bytearray(x)
+
+def bytes_str(x):
+	assert (isinstance(x, bytearray))
+	return x.decode('utf-8')
+	
+#
+# $Id$
+#