Update 30_copy_deepcopy.py

Author: MorvanZhou

basic/30_copy_deepcopy.py

@@ -1,3 +1,8 @@
+# View more python learning tutorial on my Youtube and Youku channel!!!
+
+# Youtube video tutorial: https://www.youtube.com/channel/UCdyjiB5H8Pu7aDTNVXTTpcg
+# Youku video tutorial: http://i.youku.com/pythontutorial
+
 import copy
 
 a = [1,2,3]
@@ -18,4 +23,4 @@
 a = [1,2,[3,4]]
 d = copy.copy(a)
 print(id(a) == id(d))
-print(id(a[2]) == id(d[2]))
+print(id(a[2]) == id(d[2]))