改进8题+fix2

data/1.python初阶/1.预备知识/6.编码规范/style.md

@@ -187,7 +187,7 @@ word_info['count'] += 1
 
 ```python
 word_info = word_dict.get(word)
-if not word_info:
+if word_info is None:
     word_info = {'word': word, 'count': 0}
     word_dict[word] = word_info
 
@@ -198,7 +198,7 @@ word_info['count'] += 1
 
 ```python
 word_info = word_dict.get(word)
-if not word_info:
+if word_info is None:
     word_info = {'word': word, 'count': 1}
     word_dict[word] = word_info
 else: