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Clean Up4:50 with Kenneth Love
Our app has great functionality but some of the UI could be nicer. Let's refine the interfaces a bit and make it nicer to use.
os- Python module that lets us integrate with the underlying OS
os.name- attribute that holds a name for the style of OS
os.system()- method to allow Python code to call OS-level programs
I don't think that we have a huge number of tweaks to make to our UI, but 0:00 we definitely have some. 0:03 We need more space around entries, when we are reading them, and really, 0:05 I'd rather not just keep scrolling the screen, let's see what we can do. 0:08 Let's start by giving ourselves a little bit of room after we print out an injury. 0:12 Having the menu right up against the content makes the content a little 0:17 hard to read. 0:20 So, let's go back to view entry again, view entries. 0:22 This has been a very popular function for us to modify. 0:27 So right here after we print out the content, let's print out two new lines. 0:32 And let's also again print out the equal signs for the length of the time stamp. 0:38 So two of the lines, and 0:45 then as many equal signs as there are characters in the time stamps. 0:47 Really, though, I think most of the unreadableness comes from the fact that 0:50 everything is just printed onto the string one thing after another, 0:53 just files down, like we've always been doing. 0:57 We can do better than that, though. 1:01 Let's add in the ability to clear the screen before we print something out. 1:03 To do this, we're gonna need to call some OS level stuff, 1:07 so let's bring in the OS library. 1:11 So we come back up here, and we import OS. 1:15 And I wanna make a little function that is called clear. 1:20 And what I want this function to do is to clear the screen. 1:29 And I'm gonna need this more than once, that's why I'm making it a function. 1:33 If I was only gonna ever do this one time, I just write it straight into the code. 1:35 So, what we're gonna do here is os.system, which let's us call a, 1:39 function on the system, or sorry not a function a, like a program. 1:43 And we're gonna call CLS if the OS's name is NT, 1:47 which is Windows I guess if you're on really old like 98 or 1:54 95 it won't be empty but I do believe everything else is empty. 1:58 Else, call the function clear or the, the program clear. 2:02 So we call cls if we're on Windows. 2:08 We call clear if we're on Linux, Mac, whatever. 2:10 So let's use this where we can. 2:14 I think that whenever they do something on the menu- 2:18 [BLANK_AUDIO] 2:23 That we should, or whenever we show the menu rather, we should clear the screen. 2:26 So while choice isn't Q let's call clear. 2:30 And then, I think before we call whatever the thing is on the menu that we're gonna 2:36 do, like add any entry, or view entries, I think we should clear the screen again. 2:41 So, we add clear here, and we add clear here. 2:46 Okay, I think those are pretty good. 2:49 And then I think, the last place, 2:50 maybe that we would put in clear would be right before we print out an entry. 2:52 It seems like that's one of our more cluttery areas. 2:58 So we go back to view entries yet 3:00 again, and before we start doing our prints here, let's call clear. 3:03 All right so it's gonna clear out our, our screen. 3:10 Kay. 3:14 So let's test all of this out. 3:14 [SOUND] And look, there's our menu. 3:16 Cool. 3:22 So I'm gonna add an entry. 3:23 That starts a brand new thing. 3:26 Hello, this is a new entry. 3:28 Ctrl+D. 3:30 Save it, sure. 3:33 Going back to the menu, clears out the screen again. 3:35 Let's view. 3:37 There's my new entry, and 3:39 it's nicely format, I, I've got more room, everything's more nicely formatted. 3:40 If I got to the next entry, there's just that entry. 3:44 If I wanna delete that one, come to there, 3:47 I'm gonna say, no, I don't wanna delete it. 3:50 So we just moved on to the next one. 3:52 I think we'll lose our print where we said, entry deleted, but 3:54 that's not that big of a deal. 3:58 So, yeah. 4:00 That's our app. 4:02 That's a lot better. 4:03 I did notice one thing, which if you're typing along with me, 4:04 you're gonna get too. 4:08 [BLANK_AUDIO] 4:10 Should be enter your entry, not just enter you entry. 4:13 All right. 4:16 That's our app, that's a whole lot better. 4:18 Wow, that's so much better. 4:20 About the only things I could see adding to this, would be some color coding, and 4:22 maybe a bit of tech strapping. 4:25 I'll leave all of that up to you. 4:27 But I'll add a couple of handy libraries to the teacher's notes. 4:28 Well, that's it. 4:31 We're done with another Python course, here at Treehouse. 4:32 Based on this new ability, you should be able to go and 4:35 improve older projects, or start brand new ones. 4:37 Record wins and losses on the games that we've built together. 4:40 Or, if you did the regular Expressions course, 4:42 stick the address book entries into a database table. 4:44 Be sure to let me know if you build something. 4:47 I'll see you next time. 4:49
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