Create 0004.py

ncw1992120 · web-flow · commit 7ec3e16e13f9 · 2016-06-13T17:35:48.000+08:00
diff --git a/pylyria/0004/0004.py b/pylyria/0004/0004.py
@@ -0,0 +1,29 @@
+#! /usr/bin/env python
+#第 0004 题：任一个英文的纯文本文件，统计其中的单词出现的个数。
+# -*- coding: utf-8 -*-
+# vim:fenc=utf-8
+#  Copyright By PyLyria
+# CreateTime: 2016-03-01 23:04:58
+
+import re
+from string import punctuation
+from operator import itemgetter
+
+def remove_punctuation(text):
+    text = re.sub(r'[{}]+'.format(punctuation), '', text)
+    return text.strip().lower()
+
+def split(file_name):
+    with open(file_name,'rt') as f:
+        lines = (line.strip() for line in f)
+        for line in lines:
+            yield re.split(r'[;,\s]\s*', line)
+
+if __name__ == '__main__':
+    word2count = {}
+    for line in split('chapter1.txt'):
+        words = (remove_punctuation(word) for word in line)
+        for word in words:
+            word2count[word] = word2count.get(word, 0) + 1
+    sorted_word2count = sorted(word2count.items(),key=itemgetter(0))
+    print(sorted_word2count)
