ex48 更复杂的用户输入

521xueweihan · 521xueweihan · commit 7a467dc8817f · 2015-05-31T10:05:07.000+08:00
diff --git a/ex48/skeleton/ex48/别人写的比我的好lexicon.py b/ex48/skeleton/ex48/别人写的比我的好lexicon.py
@@ -0,0 +1,26 @@
+def scan(sentence):
+        result = []
+        words=sentence.split()
+        length = len(words);
+        while words:
+            if words[0] in ['east','west','north','south']:
+                result.append(('direction',words[0]))
+            elif words[0] in ['go', 'kill', 'stop','eat']:
+                result.append(('verb',words[0]))
+            elif words[0] in ['door','bear','princess','cabinet']:
+                result.append(('noun',words[0]))
+            elif words[0] in['the','in','of','from','at','it']:
+                result.append(('stop',words[0]))
+            elif convert_number(words[0]):
+                num = int(words[0])
+                result.append(('number',num))
+            else:
+                result.append(('error',words[0]))
+            words = words[1:]
+        return result
+        
+def convert_number(s):
+        try:
+            return int(s)
+        except ValueError:
+            return None        
