dev(hansbug): add TODO at the blank position && fix a bug in answer && add...

dev(hansbug): add TODO at the blank position && fix a bug in answer && add template part in my markdown and README.md && update author of iter.md

README.md

@@ -262,13 +262,23 @@ int main(int argc, char** argv){
 
 输出 "Hello,World!" 字符串，找出错的那项。
 
+## template
+
+```python
+# this part is used to be displayed in jupyter notebook
+if ___name__ == '__main__':
+    str1 = "Hello,"
+    str2 = "World!"
+    print('str1' + 'str2')
+```
+
 ## 答案
 
 ```python
 if __name__ == '__main__':
     str1 = "Hello,"
     str2 = "World!"
-    print('str1'+'str2')
+    print('str1' + 'str2')
 ```
 
 ## 选项

data/1.python初阶/3.进阶语法/1.列表推导式/iter.json

 {
-    "author": "huanhuilong, HansBug",
+    "author": "HansBug",
     "source": "iter.md",
     "depends": [],
     "exercise_id": 190,

data/1.python初阶/3.进阶语法/1.列表推导式/iter.md

@@ -6,7 +6,7 @@ Python 独步天下的推导式表达式，使用元表推式过滤长度小于
 def test():
 	books = ('程序员修炼之道', '构建之法', '代码大全', 'TCP/IP协议详解')
 
-	# 此处请为reading进行正确的赋值
+	# TODO(you): 此处请为reading进行正确的赋值
 
 	print("太长的书就不看了，只读短的：")
 	for book in reading:
@@ -21,10 +21,33 @@ if __name__ == '__main__':
 
 请选出下列能**正确**实现这一功能的选项。
 
+
+
+## template
+
+```python
+def test():
+	books = ('程序员修炼之道', '构建之法', '代码大全', 'TCP/IP协议详解')
+
+	reading = (book for book in books if len(book) <= 4)
+
+	print("太长的书就不看了，只读短的：")
+	for book in reading:
+		print(" ->《{}》".format(book))
+
+	print("可是发现书的名字短，内容也可能很长啊！")
+
+
+if __name__ == '__main__':
+	test()
+```
+
+
+
 ## 答案
 
 ```python
-reading (book for book in books if len(book) <= 4)
+reading = (book for book in books if len(book) <= 4)
 ```