WARDING:

let me actually walk you through how I think about these questions in this section,it may be rather nagging and a bit boring, I try for simplictiy but the remarks have to be that wordy.

I strongly recommend that it's wise of you to just take a quick look,end up skipping through most of it.Unless, you want to have fun... Yes, you can read this chapter(or my whole book) as a joke, I will be very happy if my writing can bring joy and happiness to this world.

I updated these records on 170205, I didn't have time to write down my reflection on 2wd1(170116). I was so busy to read the docs and hating myself at that time.

I will show you how I struggled for the task in 3 section:

• Section 1 is the questions about open a file,how to creat a dict;
• Section 2 is how to def the HELP/HISTORY/EXIT funcitons;
• Section 3 is how much I hate myself...or, why my computer hates me.