def process_file(dst):     # 读文件到缓冲区
     try:     # 打开文件
-        pass
-    except IOError, s:
-        print s
+        
+        file = open(dst,'r')
+        
+    except IOError as s:
+        print (s)
         return None
     try:     # 读文件到缓冲区
-        pass
+        bvffer = f.read()
     except:
-        print "Read File Error!"
+        print ('Read File Error!')
         return None
-    pass
+    file.close()
  
     return bvffer
  
@@ -24,17 +26,29 @@ def process_buffer(bvffer):
     if bvffer:
         word_freq = {}
         # 下面添加处理缓冲区 bvffer代码，统计每个单词的频率，存放在字典word_freq
-        pass
-
+        bvffer = bvffer.lower()
+        for i in '“‘!;,.?”':
+            bvffer = bvffer.replace(i," ")
+        words = bvffer.strip().split()
+        for word in words:
+            word_freq[word] = word_freq.get(word,0) + 1
+        
         return word_freq
-
-
+    
 def output_result(word_freq):
     if word_freq:
         sorted_word_freq = sorted(word_freq.items(), key=lambda v: v[1], reverse=True)
         for item in sorted_word_freq[:10]:  # 输出 Top 10 的单词
             print(item)
  
+
+def main():
+
+    dst = "Gone_with_the_wind.txt"
+    bvffer = process_file(dst)
+    word_freq = process_buffer(bvffer)
+    output_result(word_freq)
+
 if __name__ == "__main__":
     import argparse
     parser = argparse.ArgumentParser()
@@ -43,4 +57,4 @@ if __name__ == "__main__":
     dst = args.dst
     bvffer = process_file(dst)
     word_freq = process_buffer(bvffer)
-    output_result(word_freq)
\ No newline at end of file
+    output_result(word_freq)