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- [Man] Hi, and welcome
back to the course.

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In this video, we're going
to be installing Flask.

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Flask is a library that works
with our Python installation

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and is what's going to let
us create our REST APIs.

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Python is really great
for installing libraries,

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because it's really
easy to instal libraries

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as long as the library has been enabled

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to work with the central
library management system

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in Python.

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This central system is accessed
via a command called pip.

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Pip is what allows us to easily
instal libaries in Python.

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There are other ways of
installing libraries, too,

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but fortunately Flask works with pip,

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so it's really easy.

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Normally, you should just use pip.

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However, because some students may have

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multiple Python versions installed,

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if you do pip only,

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that will instal packages and libraries

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in your Python 2.7 installation

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if you have Python 2.7 installed.

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Therefore, I recommend you
do pip 3.5 instal flask.

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And apologies, "flask" with a
lowercase. That's important.

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pip3.5 instal flask.

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When we do this, we're gonna instal Flask

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for our Python installation,

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and this is gonna be the
latest version of Flask.

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So just press enter, and
then that will instal it.

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In my case, I've already got it installed,

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so it's saying requirement
already satisfied,

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but when you run pip3.5 instal flask,

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it will instal six different libraries,

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Flask being one of them,
Werkzeug being another one,

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itsdangerous, click,
jinja2, and MarkupSafe,

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little really useful parts of Flask,

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and we will explore them in due time.

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Once that's done, you're
ready to continue,

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so congratulations.

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Now let's go back into atom,

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and let's create our
first Flask application.

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I'll see you there.