修改网友提出的错误，元组 `for x in (1, 2, 3): print x,` 改为 `for x in (1, 2, 3): print(x)`

Article/PythonBasis/python3/tuple.md

@@ -144,7 +144,7 @@ del tuple1
 |(1, 2, 3) + (4, 5, 6)|(1, 2, 3, 4, 5, 6)|连接|
 |('Hi!',) * 4|('Hi!', 'Hi!', 'Hi!', 'Hi!')|复制|
 |3 in (1, 2, 3)|True|元素是否存在|
-|for x in (1, 2, 3): print x,|1 2 3|迭代|
+|for x in (1, 2, 3):  print(x)|1 2 3|迭代|
 
 ## 7、元组内置函数 ##