增加了使用python中filter函数的方法

Author: qiwsir

even_odd.md

@@ -18,6 +18,15 @@
 
 ##本问题由黄老师提供并解决，[他的微博](http://weibo.com/qiyeminglu?from=feed&loc=nickname)
 
+#解决（python)
+
+    def odd(x):return x%2==1    #判断是否为奇数，是则返回true
+    def even(x):return x%2==0   
+
+    if __name__=="__main__":
+        test_lst = [7,9,12,5,4,9,8,3,12,89]
+        print filter(even,test_lst)+filter(odd,test_lst)    #利用filter函数
+
 #解决 (racket 5.2.1)
 
 ```racket

even_odd.py

@@ -1,7 +1,8 @@
-
 #! /usr/bin/env python
 #coding:utf-8
 
+'''
+#way1
 
 def odd_even_sort(lst):
     
@@ -10,7 +11,19 @@ def odd_even_sort(lst):
     tmp_list2 = [item for item in lst if not is_odd_number(item)]
     return tmp_list1+tmp_list2
 
+
 if __name__=="__main__":
     test_lst = [7,9,12,5,4,9,8,3,12,89]
 
     print odd_even_sort(test_lst)
+
+'''
+
+#way2
+
+def odd(x):return x%2==1    
+def even(x):return x%2==0   
+
+if __name__=="__main__":
+    test_lst = [7,9,12,5,4,9,8,3,12,89]
+    print filter(even,test_lst)+filter(odd,test_lst)