How to install and configure Python on a hosted server

How you can set up and configure Python on a hosted server

Uncoiling the trail to Python

Builders know that you could’t spell LAMP (Linux, Apache, MySQL, Perl/PHP/Python) on many techniques with out Python. And though, you might be in all probability effectively conscious that LAMP is the server stack powering at this time’s Web, you is perhaps questioning why you must take note of Python. Learn on for extra in regards to the energy of Python and methods to set up and configure this high-level programming language on a hosted server.

What’s Python?

Amongst all three aforementioned programming languages, Python is king. Why? Clear applications, code readability and comfort (learn: fewer traces of code). Python takes the chew out of a developer’s job in some methods as a result of, as soon as written, this general-purpose language can run just about on any pc with out requiring you to alter this system. Python is vital to such Web important applications because the GNU Mailman, mailing-list supervisor; Yum, the Crimson Hat Enterprise Linux (RHEL) household’s bundle supervisor; and the Zope content-management system (CMS) utility server.

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How you can examine whether or not Python is already put in

Chances are high Python is already put in in your hosted Linux server. When you’re uncertain, comply with these straightforward steps:

1. Run the next out of your ssh terminal:

$ ls -la /usr/bin/python

Word: Remember /usr/bin/python is the default location for the python executables.

2. Use the next command to see which model of Python you’re working with:

$ Python -V

How you can examine which model of Python you might be operating

Checking which model of Python you might be operating is determined by which Linux you’re utilizing and the patches which have been utilized to it. With many hosted servers operating the CentOS 6 distribution of Linux, the server makes use of Python 2.6.6. However once more, it’s greatest to double examine. Plus, should you’d reasonably use a more recent model of Python, say Python 2.7.2, that by no means model is perhaps already put in.

What you’ll want to put in and configure Python

To get going with Python, you’ll want a server. We advocate a GoDaddy VPS or a full devoted server should you’re able to take complete management. Moreover, varied GoDaddy shared internet hosting plans — together with Deluxe, Premium, Limitless, or Final Linux Internet and Traditional — assist Python. (Word: It isn’t accessible on cPanel and Plesk Economic system shared internet hosting accounts.) Now, you is perhaps asking your self, “What kind of hosting account do I have?” Merely log into your account, find the Merchandise tab, then broaden your view of Servers by clicking the “+” button to the left. You need to see which type of server account you personal.

Which model of Python to make use of

The overwhelming majority of Python-based apps will run simply superb with Python 2.6.x or 2.7.x. The most recent model is as much as Python 3.4.3 (as of Might 2015), however updates to the Python 2.7 department are nonetheless not prepared. The Python neighborhood helps each Python 2.x and three.x, as a result of Python 2.x was, and stays, highly regarded. Many applications nonetheless depend on it. Moreover, Python 3.x shouldn’t be absolutely backwards-compatible with some Python 2.x options. When you desire to make use of Python 3.x, consult with the step-by-step set up directions under.

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How you can set up Python 3

When you’re courageous, you possibly can set up Python 3 your self by taking the next steps:

1. Switch the compression model of the recordsdata to your server.

$ wget https://www.python.org/ftp/python/3.4.3/Python-3.4.3.tgz

2. Decompress the recordsdata with the next command:

$ tar xvzf Python-3.4.3.tgz

Word: This may create the listing /house/user-name/Python-3.4.3 and routinely decompress all of Python’s recordsdata into their applicable spots.

3. Go into that listing with:

$ cd Python-3.4.3

4. As soon as inside that listing, set up your new model of Python.

$ ./configure --prefix=$HOME/.native

Word: This step units up your configuration and makes recordsdata.

5. Then run this command:

$ make

6. And comply with that up with:

$ make set up

The final command will set up two of essentially the most helpful Python utilities:

  • pip: Python’s beneficial instrument for putting in Python packages.
  • setuptools: Allows you to obtain, construct, set up, and uninstall Python packages.

Pretty straightforward, however you’re not carried out but. Subsequent, you should add the trail to your atmosphere. I take advantage of vi, the one true editor, for this however you should utilize Emacs, nano, or another pure textual content editor. By no means use a phrase processor, resembling Microsoft Phrase or LibreOffice Author. These add formatting codes to their paperwork, which make them worse than ineffective for coding functions.

1. Go into your Bash profile configuration file:

$cd $house
$ vi .bash_profile

2. With an editor, add the next traces, then save the file:

# Python 3 
export PATH="$HOME/.local/bin:$PATH"

3. Run the next to get your atmosphere updated:

$ supply ~/.bash_profile

4. Then run the next from the shell and you must see Python 3.4.3:

$ python3 -V

You now have Python 3 put in. Congratulations!

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Why not simply run “python”?

When you simply run “python,” the executable will present the model quantity for the default Python to your model of Linux — not your newly put in model of Python. Complicated, I do know. You’ll now have two variations of 1 language in your server.

One of the simplest ways to deal with that is to make use of Python’s virtualenv module to create a digital Python atmosphere. Inside this container-like atmosphere, you should utilize your newer model of Python — resembling Python 3.4.3 or 2.7.2. — with out interfering with the preexisting Python.

How you can create a digital Python atmosphere

The simplest option to create a digital Python atmosphere is to make use of pip.

1. Set up virtualenv for all customers in your server with this primary command:

$ python3 -m pip set up virtualenv

2. Or, should you’d reasonably preserve this to the present person, use this command:

$ python -m pip set up –person virtualenv

3. Then create a listing to make use of your new atmosphere:

$ mkdir PythonTest

4. Enter the brand new listing:

$ cd PythonTest

5. And run the next to create a digital Python atmosphere, named PythonTest, within the PythonTest listing:

$ virtualenv PythonTest

6. Activate this new Python “container” with:

$ supply PythonTest/bin/activate

Your shell immediate ought to now embody PythonTest, or no matter you named your Python atmosphere. Now, you’re prepared to begin programming with Python. In fact, you possibly can at all times simply use a default older Python as effectively.

For extra on the fundamentals of utilizing virtualenv, see Python Information’s Digital Environments. Or, should you’re new to Python, consult with the Newbie’s Information to Python. Acquired questions or feedback on taming the beast we name Python? Join with the dev neighborhood, and share your breakthroughs (and even your breakdowns) within the feedback under.


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