fix 0004.py and add a README file

starlightme · starlightme · commit e9c4c502dacb · 2015-02-17T11:45:47.000+08:00
diff --git a/Jimmy66/0004/0004.py b/Jimmy66/0004/0004.py
@@ -6,7 +6,7 @@
 
 #计算单词个数
 def counter(string):
-	words = re.findall(r'[a-zA-Z]+\b',string)
+	words = re.findall(r'[a-zA-Z]+(\'[a-zA-Z]+|\b)',string) #修改了正则表达式
 	amount = len(words)
 	return str(amount)
 
@@ -21,7 +21,7 @@ def file_read(filename):
 	string = file_read('GitHub.txt')
 	result = counter(string)
 	print  'There are', result, 'words in this article.'
-	print  "这篇文章中有" + result + "个英文单词"
+	print  '这篇文章中有' + result + '个英文单词'
 
 	
 			
diff --git a/Jimmy66/0004/README.md b/Jimmy66/0004/README.md
@@ -0,0 +1,12 @@
+Some mention about a detail
+===
+
+If you regard 'They're' as two words and don't need to find numbers, just use `[a-zA-Z]+\b` is enough.
+
+Well, the way to distinguish ' from `\b` that I think up is to write re like this: `[a-zA-Z]+('[a-zA-Z]+|\b)`
+
+The order is very important, if you write `[a-zA-Z]` after `|` , it will be ignore. 
+
+What's more, in python use `'` in a string `\'` is necessary.
+
+	re.findall(r'[a-zA-Z]+(\'[a-zA-Z]+|\b)',string) 
