Effective PyCharm (2021 edition) Transcripts
Chapter: Server-side Python web apps
Lecture: Concept: PyCharm server-side features

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0:00 Let's just take a couple minutes and review some of the server side concepts that we've
0:04 seen for PyCharm and actually touch on a few more that we didn't really call
0:07 that specifically in our demo we started by saying,
0:10 let's create a new project, We'll click that new project button up in the top
0:13 We could create Django, Flask,
0:16 Google app engine, Pyramid or Web2Py pick on any one of these and you
0:21 get to select the particular details.
0:23 So for example, if we pick Django,
0:25 we can decide whether or not to enable the Django admin.
0:28 so, really quick and easy way to create these PyCharm has fantastic html support
0:33 because it's built on WebStorm but it also has rich server side template support.
0:39 So here for example, we're working in a html template that is a Chameleon template
0:44 It's wrapping a larger common look and feel shared underscore layout dot pt file.
0:50 We want to add a div that has some template attribute language,
0:53 some tal code on it. Right.
0:56 This is the way things work in chameleon so we say tal colon and boom,
0:59 look at that. We get all the language features of chameleon.
1:02 Super, Super cool. If you're going to create structured html that has especially repeated
1:08 items, you can use zen coding.
1:11 You just write basically CSS expression of what you wished existed.
1:15 For example, here's a div that has a class menu contains a 'ul'.
1:19 That has an id.
1:20 menu list and within there there's five list items that are the class menu item
1:27 who hit tab and boom it auto expands that and we even guides us through filling
1:32 out the elements of our list items.
1:34 Super, super, cool. So if you're going to create something that has the
1:37 structure, you really know precisely where you're gonna get,
1:41 take a moment before you just start writing it all out and remember that you can
1:44 do this. Cool little zen,
1:45 Coding expansion if you need to change a tag,
1:49 especially on large files, it can be really air prone up on one section.
1:53 You want to change say a div to a span,
1:56 you gotta go down to the bottom and remember this was the closing div tag that
2:01 matched the one that I changed and if you get it wrong,
2:04 boom things are gonna crash. Not just your html will look bad but these server
2:08 side templates will crash, they can't pars themselves and it's all sorts of badness.
2:13 The PyCharm has a cool trick.
2:15 You just type on the definition to change the tag name and guess what?
2:19 It will change the corresponding closing one as well.
2:22 So here if we go to the select 'div'.
2:25 For the opening div type span and see the bottom slash div has changed our correspondent
2:29 We updated to slash span.
2:33 We also saw in great CSS support so if we bring in some CSS library or
2:39 if we write our own and we go work with a class on the html side
2:44 It will auto complete all of the classes and id's and stuff that we've worked
2:48 with before and vice versa. If we define,
2:52 we start using some class names or
2:55 'id'. names in html and then go work on the CSS side.
2:58 It auto completes those as well and it looks like you're trying to use this tweet
3:03 class that you define over in your template.
3:05 So bi directionally we get awesome support for CSS Auto complete here's when we haven't touched
3:11 on, although you may have noticed,
3:13 check out this thing at the bottom.
3:15 So here we are in a template,
3:16 it's gonna div that has a class content.
3:19 It's kind div inside there, that's a hero then a row and then a smaller
3:23 column thing and then a sub hero.
3:26 So if we put our cursor online,
3:27 15 check out was here on the bottom.
3:30 It shows us the hierarchy, it shows us that we're in the div to install
3:35 dot sub hero which is contained in the small column of block size eight,
3:41 which is in a row which is a hero and you can actually click on those
3:44 especially helpful in a very large file.
3:46 Like what is this hero thing.
3:48 Again, you could click on 'div.hero' would jump you to line six and
3:52 then you can click back onto the red piece that would take you back to where
3:56 you are. So it will do that without actually moving your cursor and losing track
3:59 but it lets you quickly explore the hierarchy of html.
4:02 So don't forget about this. It's incredibly helpful on large and complicated html pages.
4:08 We saw a static file support is fantastic,
4:11 but only if we set it up correctly.
4:13 So it got set up correctly in our flask app because we created it from scratch
4:18 in PyCharm. But if that wasn't the case,
4:20 you might need to indicate the PyCharm right here.
4:24 This subdirectory actually corresponds to '/static'.
4:27 So the way you do that is you go to the directory at the top in
4:30 this case chapter eight 'Async',
4:32 databases and we mark that as a resource root.
4:36 Not static but the thing that contains static.
4:39 When we do that, you can see the errors of the missing CSS pieces are
4:43 gone and we get auto complete.
4:46 Super cool. We could even go to definition with 'cmd+b' or command click or
4:51 you know the control version on the other OS. Finally I did mention there's ways to
4:56 run little tasks like bundling and minification and whatnot.
5:00 So if you go to the run configuration for your web app and then scroll down
5:05 often this is off the screen,
5:06 there's a little before launch, hit the plus,
5:08 check out what you get file watchers,
5:11 grunt task, Gulp task, npm task compiling,
5:14 Typescript. running something else, some other python code that you write launching a web
5:20 browser, all sorts of stuff.
5:21 So pretty much endless ways to prepare your web app to run before it actually opens
5:28 and starts running the python code here and that's it for our service side features that
5:32 we're going to cover. This is one powerful web application for building python web apps
5:37 that involve all the various pieces that modern web apps do.
5:41 I absolutely encourage you to check it out.
5:43 This is the tool that we use to build,
5:45 talk python training and all the API's powering it from the back end and it
5:50 is a joy to you. So hopefully you can get as much out of it as we do.