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PyCharm Installation and Introduction
14:36PyCharm is a great IDE, or Integrated Development Environment, from JetBrains for writing Python. Let's explore how to get and install PyCharm and some of its great features.
Hi, Kenneth here.
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For almost all of the Python, Flask, and
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Django we've done here at Treehouse,
you've used Workspaces.
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Workspaces is an amazing tool but you
probably don't want to use it when you're
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writing code on your own computer or
at work.
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You'd probably rather use a text editor or
an IDE Text editors and
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IDEs provide some very handy tools like
code coloring, automatic code cleaning and
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syntax error checking and much more.
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In this workshop, I wanna show you
some of the features of a great
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Python IDE from JetBrains named PyCharm.
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An IDE, which stands for
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Integrated Development Environment, is
a programming tool that encapsulates a lot
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of very useful tools like code editors,
GIT integration, and
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debugging tools into one handy package,
and PyCharm is no exception.
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PyCharm provides all of the features
that I mentioned before and much more.
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Like automated refactoring, coverage
supports for your tests, and solid
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code suggestions when you're using Django
Pyramid, Flask, and other frameworks.
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I won't be able to show you
everything that PyCharm offers.
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That would simply take way too much time,
and besides that,
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Jet Brains offers some wonderful
documentation that you can refer to for
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things that I don't get to,
or that you forget.
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So head over to Jetbrains.com,
download the free trial of PyCharm, and
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let's get started learning
about this very handy idea.
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Okay, so this is the PyCharm website
from JetBrains, and you can come here,
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read through the docs and demos,
the features, all that kind of stuff, but
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what you're ultimately looking for
is this download button or
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this Get PyCharm Now button,
same difference, and
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you can download
the Community Edition if you want.
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It's free.
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It'll do most of the stuff that I'm
gonna show you in this workshop.
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There are some things that it won't do
that only the professional version does.
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Now the cool thing is, if you get the
professional version, if you wanna get it
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and you go to the buy link, there
are ways to get it for less or for free.
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So if you're buying it for yourself, it's
only $90 a year which is fairly cheap.
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I know it's not insanely cheap, but
it's fairly cheap, and then there's
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also some discounted ones for education,
and training so that the teachers.
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As you're a student,
if you email in to Jet Brains,
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they might give you This qualification.
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I'm not sure of they will or not,
but it's worth asking about, right?
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And if not,
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then there's definitely the educational
version that you should be able to use.
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Alright, so you'll get PyCharm, you'll
get it installed, you'll launch it and
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it'll look something like this.
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So, I want to create a new project, and
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I want it to be a Python project,
but I don't want it to be 2.7.
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I installed 3.5, and
if you haven't done that yet,
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you can go check out
the local Python workshop.
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So, I need to tell this
where this interpreter is.
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Now, you only need to do this one time,
but you see these ellipses there,
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you're going to click on those,
and you're going to say Add Local.
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So you're gonna add in a local python.
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Now it's not at user/bin/python for me.
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It is at another directory,
which I don't remember.
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So, let's do this.
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Terminal, which python3.
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So it is at this Directory.
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So I'm going to copy that.
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Okay, here we go.
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So, paste that in, and it finds it.
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Awesome, and I say okay, and
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it's going to update these skeletons
which really this is just like,
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how do we, what are all our bits and
pieces of Python three.
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So I'm going to do that and that's
cool and it creates this directory for
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you called PyCharm Projects and so
I'm just going to put a name in here and
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I'm just call PyCharm Workshop,
so that's what we're doing and
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I'm going to hit create And boom.
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So we have our workshop.
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So we've got a project's files thing here,
which there's nothing listed in yet
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except for this idea,
which are configuration files for idea.
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Which is the ide that Python was based on.
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It's based on idea.
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So you'll see the dot idea folder or you
can click on project and you'll see this,
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and this'll show you like
external libraries, so
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here's Python's libraries and
all that stuff.
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Most of the time you're not
going to care what's in there,
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you'll only care what's in here.
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So feel free to look at the project files
view instead, it's a little bit nicer.
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So we added an interpreter and
we started a new project.
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So let's start a new script.
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I'm gonna here on PyCharmWorkshop.
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I'm gonna hit command n, and
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you're gonna see this thing
right here the screen thing.
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I have that turned on for you.
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You won't have that on your
own version of PyCharms but
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don't worry about that
popping up all the time.
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So we can say a new file, or we can
specifically say a new Python file, and
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then since I have the pro version,
I can do HTML files, JavaScript files,
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stuff like that.
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So I'm just gonna go ahead and hit file,
because it doesn't really matter, and
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we're gonna do a new file name.
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So I'm just gonna say first.py,
this is my first Python file.
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We're here.
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All right, so
a couple of things we wanna to turn on.
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Let's go to view and active editor, and
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we wanted to show white space because
white space is important on Python, and we
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wanted to show line numbers because line
numbers are important in every language.
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You also see that we had these
indent guide turn on, and
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you will see that in just a minute.
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So let's make a function 'cause this is Python,
and so all these IDs,
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one of the things they offer is
something that's called intellesense or
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codecompletion or there's probably
several other names for it.
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If I do d e,
you see this window that pops up.
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This window is PyCharm trying to
figure out what I want to do So
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if I just have a d there's a whole lot of
options because there's a lot of things
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that have d in them, but
it knows that def is the most likely.
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I probably wanna type def.
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So I can actually just hit tab and
it just puts that in for me.
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I can also do dot,
that doesn't do anything.
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In some IDEs, dot does the completion.
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In PyCharm it does not But I can also
just hit enter and that'll put it in.
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So def and then we'll put in a name for
our function, so
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let's just say say_hello and
we'll require a (name) argument,
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and now we're inside of our function,
and so you can see so
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we've got our indentation stuff here and
these right here lets us do code folding.
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We'll talk about that in just a minute.
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So first of all let's just print out,
actually I want to show you that too.
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If I type in print, see how it has this
objects, sep, end, file, whatever?
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If I do print and I just sit here for
a minute it starts to show this stuff, and
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I could put in these mini objects as I
want separators and things like that.
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So I'm gonna put in Howdy and
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these two bits and I close my string,
and then it starts pulling up.
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These are the things
that all work on strings.
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See how they have str over here.
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This shows the class that they work on.
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I want format, so I gonna do fo,
and it's like, he wants format.
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So it pops that up.
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I can press enter and format comes up.
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Format just expects args and kwargs,
so we need to pass those in.
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So I'm gonna put in the name variable,
and,
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again it doesn't just work with Python.
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I type N and it know that it has
a parameter called Python or
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called name rather, and so I can just
press ENTER and it'll put name in for me.
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So if I wanna be really lazy and
if I don't want to do a lot of typing.
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PyCharm goes a long way in that.
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So let's add in some more stuff here.
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First of all I wanna
show this code folding.
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If I click on either one of these
minus signs, then it folds up, and
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you can see it as an ellipsis here and
it's got a plus sign here.
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Now if I hover over the ellipsis,
it'll show me the bottom of the function.
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Let's add in a little bit more stuff here,
and
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let's actually break this
out a little bit, and
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we'll pretend that we don't,
we've got a lot more code than we do.
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So if we close this up, and
then it'll show me my whole thing, and
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if I open it back up,
You see this vertical lines running here?
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Those are my indentation guides.
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Now sometimes the indentation guides and
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the white spaces kind of conflict, and
you might wanna turn one on or the other.
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I kinda like having them both on.
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I don't mind the visual noise,
but that's gonna be up to you.
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So now let's actually use our function.
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So we'll say if and again I do the I,
starts to give me a bunch of stuff, right?
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But if and
then I need to do something for my if.
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Now I haven't done anything yet.
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You notice there's these squigglies,
the red squigglies.
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That means something is wrong and
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if you look at those red
squigglies on the file name.
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In both places it shows up.
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So there's something wrong in this file,
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and there's even a red line right
over here and it's saying, okay.
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I'm either expecting an indent or
an expression.
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I don't know which thing I'm expecting,
and
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up here is another warning telling us
that there's a couple of errors found.
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So let's go ahead and do this.
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So if.
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Name is equal to dunder main.
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Then we want to do, say hello,
and we'll pass in Kenneth.
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So I saved everything, command S.
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This whole thing that pops up here,
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these are like options that PyCharm
thinks you might want to do.
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So you can click on that.
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You can choose to reformat the file.
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You can do a lot of other stuff.
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Let's see what happens if
we choose reformat file.
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So it made it look a little bit nicer,
kinda cleaned up a couple of things.
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It put more spaces in right here.
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Let's command + Z See
there's only one space there.
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So there's only one space,
I can actually come up here to a code,
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that's where it is and choose reformat
code and it'll do that for me.
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Where this is really cool is
if we did something like this.
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So, read and say two spaces right there,
and then I can come up to Code and
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reformat Code, and
it knows how I like Python code,
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and knows Python code is four spaces,
things like that.
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So it'll automatically reformat that for
me.
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It's a handy thing to
do from time to time.
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So let's save this, and
now, let's run this file.
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I need to go out to my terminal, right?
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No, I don't.
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That's the cool thing.
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I can go here to run, and I can choose
this run with the three ellipses.
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I only have to do this the first time.
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I choose that and
these are my run configurations.
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So I can make a new configuration,
or I can let Pi term do what it
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thinks I wanna do which is to run
first which is what I wanna do.
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So I'm gonna run it, and this right here.
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So, we have multiple windows
at the bottom, here.
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This window right here is window
number four, and it's called run, and
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the out put was Howdy, Kenneth.
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You can see here, it ran python three,
and it ran first.pie.
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It ran, it printed out Howdy, Kenneth,
and finished with an exit code of zero.
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So this is nice for a quick way to just
run your program, and this works for
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really long programs,
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really short programs, whatever kind
of program you are working on, and
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you can either click this button
here that kinda looks like it's
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pointing at a thermometer, or you can just
click run and it'll hide that for you.
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If your process was really long running,
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you would have a stop sign over
here too that you could hit stop.
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All right.
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So let's say that I want to make my
program a little bit more random,
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and I want to get a number, and I
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want to do random.randint(1, 10000), and
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then I want to say Howdie Kenneth and
then I want to print your hour
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visitor, and
I'm gonna format that with numb.
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So I dont have random imported.
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See how it has this underline?
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The squigglies again?
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So it doesn't know what to do there.
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So if I hit option enter on this line it
doesn't know what to do, but if I'm on
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this line and I hit option enter,
it's like okay how do we figure this out?
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So I can tell it to just to ignore
it like, this stuff is all good,
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don't worry about this stuff.
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I can do that in two different places,
or I can rename it.
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Maybe I used the wrong name.
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I didn't want to use random,
I wanted to use some of the library, or
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I can tell it to import this name.
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So I'm going to see if they're the same,
and
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then I get to pick where
I want to import it from.
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I can import it from random, or
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I can try to import it from random.random,
which isn't going to work.
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So let's import from the python library,
random.
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Press Return and
now import random is up here.
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So this is just a holdover.
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We don't need that any more.
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So we'll save again, and so now,
we don't need to go to Run and
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then the one with the ellipses.
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We can just say run first,
we can hit Ctrl+R,
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or we can just click this arrow up here.
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So I'm the three thousand and
sixtieth visitor, cool.
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Let's run it again to see
what number I get that time.
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Thirty eight o'nine.
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Getting a lot of numbers
close to each other,
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and every time I click this the play
arrow I just get it run again.
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So that's pretty nice.
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Even nicer is this kind of thing.
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I'm like I dont 'like that anymore,
I'm gonna take that out and
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I'm not gonna get a random number anymore.
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So let's save.
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First of all, two things happened.
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I have input random is now grayed
out it's not being used anymore, and
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I'm not using it, so
I should get rid of it.
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So if I go to code and
I choose optimize imports, or on a Mac,
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control option O, then the import is taken
out, because I'm not using it anymore,
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and if I save and I run, everything
works just like it did the first time.
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So, being able to create
a new interpreter.
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Being able to use IntelliSense to
figure out what code I want to put
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it because maybe I don't remember all
these things, and I don't remember all
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the arguments to these things, and then
being able to let it handle my imports for
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me, whether that's adding new ones or
taking ones out, is really really useful.
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