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--- courses:be5b33prg:homeworks:spam:step4 [2015/10/15 15:13]
xposik [Preparation]
+++ courses:be5b33prg:homeworks:spam:step4 [2015/10/15 15:18]
xposik [Preparation]
@@ Line 19: / Line 19: @@
   * What are the minimal requirements for such an implementation? What does it have to be able to do, and what inputs and what outputs does it have to have?
-Read how the //inheritance// in OOP works and how it is used in Python. You can find more information here:
-  * in the official [[http://docs.python.org/release/3.2.3/tutorial/classes.html#inheritance|Python tutorial]], or
+**Optional (for more advanced programmers):** Read how the //inheritance// in OOP works and how it is used in Python. You can find more information here:
-  * in {[a4b99rph:Downey2009]}, [[http://www.greenteapress.com/thinkpython/html/book019.html|chapter 18]], [[http://www.greenteapress.com/thinkpython/html/book019.html#toc199|section 18.7]], or
+  * in the official [[https://docs.python.org/3/tutorial/classes.html#inheritance|Python tutorial]], or
   * in {[a4b99rph:Wentworth2012]}, [[http://openbookproject.net/thinkcs/python/english3e/inheritance.html|chapter 23]].
 /*
@@ Line 37: / Line 38: @@
     * ''ParanoidFilter'' which classifies all the emails as ''SPAM'', and
     * ''RandomFilter'' which assigns the lables ''OK'' and ''SPAM'' randomly.
-    * If these 3 filters have some functionality in common, try to extract it into a common ancestor called ''BaseFilter'' **in module ''basefilter.py''**.
+    * **Optional:** If these 3 filters have some functionality in common, try to extract it into a common ancestor called ''BaseFilter'' **in module ''basefilter.py''**.
 Why do we need it?