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[no audio]

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Hi friends, here

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we are going to see how to install Python on your Linux or

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any Unix-like systems or 'Installing required Python on Linux'.

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See why I am saying, 'Installing required Python on Linux', because

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if we go with any one of the Unix-like systems, most

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of the Unix-like systems are already configured with anyone

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of the Python version based on the release of your Linux

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kernel. Right. Now let me open

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my OS. So this is Linux,

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or more specifically it is

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Amazon Linux,

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okay, and it is released in 2018, March.

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Now if I run simply see 'python --version' you're getting

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some Python 2.7.16, means this is the default version

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for this Linux.

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And you can also have your

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[no audio]

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'pip --version' as well.

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I mean 'pip' is also configured.

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So by default most of the Unix-like systems are configured

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with your Python, and you may get, that version maybe 2.5 or

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2.7 or 2.6, whatever it maybe based on when it was released,

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I mean your Linux, when it was released, and but here I need

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some 3.x version.

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Suppose, let us say 3.7.0

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I need on this host,

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on your Linux,

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so guys first of all before going to install your required

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Python version on your any Unix-like systems don't disturb

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existing Python because your 'm' command will depend on your

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Python, or some operations on your Unix-like

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systems will depend on your Python

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that's why don't disturb the existing Python version.

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[no audio]

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I mean whenever if you're going to install any new Python

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don't take name as 'python'. Instead of that 'python',

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let's say 'pythonx', 'pythony', something like that, or 'python3',

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in that way just take the name for your Python software,

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right? So in that way you have to install. And first let me

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enter into root. Because I have to install this python so

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I should be the root user, or you can also run from any user,

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for that you should have some root privileges.

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So instead of all confusions first I enter into root, now

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I am the root user.

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Right. Now you have some steps guys,

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very simple steps.

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Let me go with very first step.

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See let me open your official website 'python.org'.

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[no audio]

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So, you know by default you have some 'Download' tab, then

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there you can see 'View the full list of downloads', and here you

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can select your required operating system.

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I'm going to work with Unix-like systems, then simply

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I'm clicking on 'Linux/Unix'.

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Now see you have latest releases, but I need suppose 3.7.0,

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let me go and see somewhere my 3.7.0. Here

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I'm having my 3.7.0.

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Right. So let me download your 'source tarball'.

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So to download that on your Unix-like systems, from command

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line of your Unix-like systems

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you can download. So for that just copy the link location

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of your required Python software.

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[no audio]

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I copied the link location. Now go to here and first check

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whether 'wget' command is there or not. If it is not there

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just simply run 'sudo yum install wget'.

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Right. Already there, that's why it is not installing.

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Then let me enter into any location.

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So I'm entering into '/opt/'.

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So there I am going to download my Python software, Python

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'tar source wall, right. After that

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now see that. Just now you downloaded

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your required Python package.

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Now, you have to extract it.

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[no audio]

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Right. So to extract that simply use 'tar -xvzf'. So here

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'v' for 'verbose'. You can see the information while extracting.

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That's it.

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Right. Now you have your extracted package.

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Now you can go and install your Python, but before going

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to install your Python, right, actually this is a source file,

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you need to compile. To compile that you need some compiler

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and some packages as well.

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I mean some dependencies you need to install your

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Python on your host.

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So I have a list of dependencies, right, just before going

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to install your Python

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just run this command 'yym install', your 'gcc

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openssl - devel', right, all those things you have to install.

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[no audio]

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Once if we install all these dependencies, all these packages,

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right, now just navigate into your extracted directory, or

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extracted Python package, and there if you observe you have

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some 'configure', now run './configure' command first.

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So here guys, basically your './configure' you are going

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to provide to check your configuration details along with

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that you can also provide the path where you want to install

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your Python, with this option '--prefix'. Then suppose

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I want to install somewhere '/usr'

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some '/bin' location, yes you can provide your path, or if you

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skip this value, '--prefix' value, by default your 'configure'

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will install, right, your Python package, required Python under

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'/usr/local/bin'. In this location by default

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it will install. So I want to install in that location only,

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that's why I'm not giving any prefix, right. And you can also

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use some '--enable-optimizations', right, if you provide this

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option it will take some time so you can check it by providing

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'--enable-optimizations'. But I am not giving that because

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it will take some time, right.

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You can just try, or you can also try simply './configure',

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just 'Enter'.

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[no audio]

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So it will take some time to configure your details on your host.

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[no audio]

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So after configuration, simply you have to compile your

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code, I mean your, whatever the package you download it,

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right, that you have to compile.

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So for that you need to run a command called 'make', so that

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you are going to compile your code.

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[no audio]

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Right. Yes, done.

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Now, let me run 'make', and before that observe that it is also giving

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a suggestion called 'Please run ./configure --

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enable-optimizations', right to give this information.

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But anyway I'm not running that, you can try it, right. Now

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after configuration

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just run 'make'. So 'make' is nothing but you are going to compile

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your downloaded, your Python source code. Once if we compile

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then you can install, right.

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So now I am compiling.

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So it will take some time. Again,

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just wait for some time.

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So once it is done then we'll go and install.

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[no audio]

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So still it is compiling your Python package.

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Yes, your compilation is done.

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Now simply run 'make'.

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[no audio]

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So guys in case if we have, if we don't

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have any previously installed Python versions, then simply

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you can run 'make install', but we already have Python version,

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and you don't want to disturb that that's why use

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'make altinstall', and 'Enter'.

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Now it is going to install your Python.

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Right. Again, it will take some time. Just wait.

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So once it is done then

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we will verify your installed Python

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version. Just wait.

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Done. Right. See guys, I told that by default, right, your Python

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will install under the location of '/usr/local/bin'

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if you don't provide any prefix while running your 'configure'.

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If you don't provide any prefix means, where you want to install.

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If you don't, skip this, if you skip this path your Python

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will install under this location, '/usr/local/bin'.

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Just check it. 'ls -lrt /usr/local/bin', see the files

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what you are having, right?

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See the date.

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See, July 4th.

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So as of now we installed these files.

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[no audio]

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Now, this is your Python,

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right, and this is your 'pip', and see that the name is 'python3.7'.

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It is not like Python because on your Unix-like systems by default

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your Unix-like system will depend on any one of the Python

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version, and it is there by default with your operating system.

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Now if you install any other Python versions, right, Python3,

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or even any Python 2 also, right, you have to provide some different

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name. Anyway, we are installing Python 3. On my host already

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I have Python 2, that's why by default Python is giving some

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name 'python3.7', right. Now,

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you can verify your Python 3.7 by entering into this location.

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Let me enter into 'usr/local/bin', and let me provide

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'./python 3.7 --version', right?

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So you have now your Python version here,

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some 3.7.0.

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Guys, if you observe, previously whenever if you run our 'python'

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command 'version', we are running in this way, but here I am

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using './'. If I don't use './', see that how you're

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going to get 'python 3.7 --version'.

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[no audio]

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Now, come out from this location, and check it. 'python 3.7 --version',

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and observe the output.

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[no audio]

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Right. You are getting your Python 3.7 version, or which Python

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3.7? '/usr/local/bin/python3.7', and see that

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'echo $path'.

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[no audio]

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See your 'usr/local/bin' is already there in your system path,

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that's why your python 3.7 is also able to be identified by

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your operating system.

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Now, I don't want use like Python 3.7,

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I want to use like Python 3, then is there any word called

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Python 3? No. You just try to create one soft link.

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Let me create, So where we are?

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Let me enter into that location.

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[no audio]

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Now what I am doing is I'm creating a soft link called

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'ln -s', your 'python3.7' to simply 'python3'.

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Now I can run from anywhere

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simply 'python3'.

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[no audio]

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That's it. Right.

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Now one more thing. You have here 'pip 3' for Python 3. To manage

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your packages or modules with your Python 3

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we have the 'pip' command, right?

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So but here the name is 'pip.3.7'

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Sorry 'pip3.7', but I don't want to use in this way,

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I mean 'pip3.7', I want to use like 'pip3'. But anyway don't create

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like 'pip' because already 'pip' is there with Python so that's

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why I'm creating 'pip3'.

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Right. Let me create again soft link for this 'ln - s pip3.7', simply

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'pip3', that's it.

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[no audio]

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Right. Now simply 'pip3 --version. Now come out from

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here or exit from that root, and from anywhere

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you can run now your 'python' command in this way, 'python'. Only

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python. will give you python 2.x version, and 'python3 --version'

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will give you now your Python 3 details. The same

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way only 'pip' is for your Python 2.

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Now 'pip3' is for Python 3. That's it.

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[no audio]

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Right.

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Okay. So guys whatever the steps we've done as of now, right, all those

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are these things.

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So guys, you know something like Ubuntu, in that distribution

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already you have some Python 3.6, something like that.

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If you want to use that also you can use it. No problem.

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Okay. Whatever it may be we need some Python 3.x, but here we install

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Python 3.7.0.

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Right. Because we are going to work with Python 3.x, and

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especially I am using python 3.7.0,

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that's why I installed this. Okay.

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Okay guys, thank you for watching this video.

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[no audio]