101 lines
3.1 KiB
Python
Executable File
101 lines
3.1 KiB
Python
Executable File
#!/usr/bin/env python
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import sys, re, operator, string
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class DataStorageManager():
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""" Models the contents of the file """
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_data = ''
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def dispatch(self, message):
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if message[0] == 'init':
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return self._init(message[1])
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elif message[0] == 'words':
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return self._words()
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else:
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raise Exception("Message not understood " + message[0])
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def _init(self, path_to_file):
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with open(path_to_file) as f:
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self._data = f.read()
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pattern = re.compile('[\W_]+')
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self._data = pattern.sub(' ', self._data).lower()
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def _words(self):
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""" Returns the list words in storage"""
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data_str = ''.join(self._data)
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return data_str.split()
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class StopWordManager():
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""" Models the stop word filter """
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_stop_words = []
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def dispatch(self, message):
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if message[0] == 'init':
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return self._init()
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elif message[0] == 'is_stop_word':
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return self._is_stop_word(message[1])
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else:
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raise Exception("Message not understood " + message[0])
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def _init(self):
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with open('../stop_words.txt') as f:
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self._stop_words = f.read().split(',')
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self._stop_words.extend(list(string.ascii_lowercase))
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def _is_stop_word(self, word):
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return word in self._stop_words
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class WordFrequencyManager():
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""" Keeps the word frequency data """
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_word_freqs = {}
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def dispatch(self, message):
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if message[0] == 'increment_count':
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return self._increment_count(message[1])
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elif message[0] == 'sorted':
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return self._sorted()
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else:
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raise Exception("Message not understood " + message[0])
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def _increment_count(self, word):
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if word in self._word_freqs:
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self._word_freqs[word] += 1
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else:
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self._word_freqs[word] = 1
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def _sorted(self):
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return sorted(self._word_freqs.items(), key=operator.itemgetter(1), reverse=True)
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class WordFrequencyController():
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def dispatch(self, message):
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if message[0] == 'init':
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return self._init(message[1])
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elif message[0] == 'run':
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return self._run()
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else:
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raise Exception("Message not understood " + message[0])
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def _init(self, path_to_file):
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self._storage_manager = DataStorageManager()
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self._stop_word_manager = StopWordManager()
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self._word_freq_manager = WordFrequencyManager()
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self._storage_manager.dispatch(['init', path_to_file])
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self._stop_word_manager.dispatch(['init'])
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def _run(self):
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for w in self._storage_manager.dispatch(['words']):
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if not self._stop_word_manager.dispatch(['is_stop_word', w]):
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self._word_freq_manager.dispatch(['increment_count', w])
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word_freqs = self._word_freq_manager.dispatch(['sorted'])
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for (w, c) in word_freqs[0:25]:
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print(w, '-', c)
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#
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# The main function
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#
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wfcontroller = WordFrequencyController()
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wfcontroller.dispatch(['init', sys.argv[1]])
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wfcontroller.dispatch(['run'])
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