Added reactive version

32-trinity/tf-31-reactive.py

@@ -0,0 +1,50 @@
+#!/usr/bin/env python
+import sys, re, operator, collections
+
+class WordFrequenciesModel:
+    """ Models the data. In this case, we're only interested 
+    in words and their frequencies as an end result """
+    freqs = {}
+    def __init__(self):
+        self._observers = []
+
+    def register(self, obs):
+        self._observers.append(obs)
+
+    def update(self, path_to_file):
+        try:
+            stopwords = set(open('../stop_words.txt').read().split(','))
+            words = re.findall('[a-z]{2,}', open(path_to_file).read().lower())
+            self.freqs = collections.Counter(w for w in words if w not in stopwords)
+            for obs in self._observers:
+                obs.render()
+        except IOError:
+            print "File not found"
+            self.freqs = {}
+
+class WordFrequenciesView:
+    def __init__(self, model):
+        self._model = model
+        model.register(self)
+
+    def render(self):
+        sorted_freqs = sorted(self._model.freqs.iteritems(), key=operator.itemgetter(1), reverse=True)
+        for (w, c) in sorted_freqs[:25]:
+            print w, '-', c
+
+class WordFrequencyController:
+    def __init__(self, model, view):
+        self._model, self._view = model, view
+
+    def run(self):
+        self._model.update(sys.argv[1])
+        while True:
+            print "Next file: " 
+            sys.stdout.flush() 
+            filename = sys.stdin.readline().strip()
+            self._model.update(filename)
+
+m = WordFrequenciesModel()
+v = WordFrequenciesView(m)
+c = WordFrequencyController(m, v)
+c.run()