--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/py/gadict_freq.py	Tue Nov 08 17:44:04 2016 +0200
@@ -0,0 +1,127 @@
+
+import sys
+import codecs
+import io
+import regex
+
+class WordlistParser:
+
+    def __init__(self, stream):
+        self.stream = stream
+
+    def parse(self):
+        wlist = []
+        while True:
+            line = self.stream.readline()
+            if len(line) == 0:
+                break
+            line = line.strip()
+            wlist.append(line)
+        return wlist
+
+class BasewordParser:
+
+    BASEWORD_RE = regex.compile(u"^(\t)?(.*)$")
+
+    def __init__(self, stream, limit):
+        self.stream = stream
+        self.limit = limit
+        self.lineno = 0
+        self.cnt = 0
+
+    def parse(self):
+        wlist = []
+        while True:
+            line = self.stream.readline()
+            if len(line) == 0:
+                break
+            self.lineno += 1
+            m = self.BASEWORD_RE.match(line)
+            if not m:
+                raise Exception("Line {:d}: '{:s}' wrong format\n".format(self.lineno, line))
+            tab = m.group(1)
+            if not tab:
+                self.cnt += 1
+            if self.limit and self.cnt > self.limit:
+                break
+            headword = m.group(2).strip().lower()
+            wlist.append(headword)
+        return wlist
+
+class FreqlistParser:
+
+    FREQ_RE = regex.compile(u"^([0-9]+) (.*)$")
+
+    def __init__(self, stream, limit):
+        self.stream = stream
+        self.limit = limit
+        self.lineno = 0
+
+    def parse(self):
+        wlist = []
+        while True:
+            if self.limit and self.lineno >= self.limit:
+                break
+            line = self.stream.readline()
+            if len(line) == 0:
+                break
+            self.lineno += 1
+            m = self.FREQ_RE.match(line)
+            if not m:
+                raise Exception("Line {:d} is not in NUM WORD format\n".format(self.lineno, line))
+            headword = m.group(2).strip().lower()
+            wlist.append(headword)
+        return wlist
+
+if __name__ == '__main__':
+    USAGE = "Usage: PROG  $WORDLIST  [+/-][NUM][b/f]:FREQLIST..."
+
+    if len(sys.argv) < 3:
+        raise Exception(USAGE)
+    FINAME = sys.argv[1]
+
+    with io.open(FINAME, mode='r', buffering=1, encoding="utf-8") as stream:
+        parser = WordlistParser(stream)
+        HEADWORDS = parser.parse()
+
+    COMMAND_RE = regex.compile("([-+])([0-9]+)?([bf]):([^:]+)")
+
+
+    IN_SET = set()
+    EX_SET = set()
+
+    for idx in range(2, len(sys.argv)):
+        spec = sys.argv[idx]
+        m = COMMAND_RE.match(spec)
+        if not m:
+            raise Exception("Wrong FREQLIST spec: '{:s}'\n".format(spec) + USAGE)
+        fname = m.group(4)
+        limit = m.group(2)
+        mode = m.group(3)
+        if limit:
+            limit = int(limit)
+        with io.open(fname, mode='r', buffering=1, encoding="utf-8") as stream:
+            if mode == "b":
+                parser = BasewordParser(stream, limit)
+            elif mode == "f":
+                parser = FreqlistParser(stream, limit)
+            else:
+                raise Expection("Unknown mode in specification...")
+            try:
+                wlist = parser.parse()
+            except:
+                print("Error during processing: {:s}".format(fname))
+                raise
+        wlist = set(wlist)
+        if m.group(1) == "+":
+            IN_SET |= wlist
+        else:
+            EX_SET |= wlist
+
+    for headword in HEADWORDS:
+        if any(c in headword for c in " '."):
+            continue
+        normilized= headword.lower()
+        if (len(IN_SET) == 0 or normilized in IN_SET) and not normilized in EX_SET:
+            print(headword)
+