Python Jumpstart by Building 10 Apps Transcripts
Chapter: Welcome to the course
Lecture: Python 2 or Python 3 and editors
0:00 Before we get to the actual apps that we are going to build,
0:03 let's talk a little bit about the tools we are going to use,
0:05 how you use them up, and even just a little bit of history.
0:08 The first question that you get a lot of times
0:11 when you start talking about Python, Python apps, Python course,
0:14 is... what version of Python is it going to run on?
0:18 It turns out this is kind of a big question,
0:19 so let's talk about that first.
0:22 To appreciate this, let's look at the history of Python.
0:25 In the beginning, it came into existence as a concept in 1989,
0:30 it was released in 1991, had a couple of major releases,
0:35 version 2 came out in 2003, today it's 2016.
0:40 So, development started, version 1 was released, version 2 was released,
0:45 and then version 3 actually was a major breaking change to the Python code.
0:51 The developers look back over the 17 years of experience
0:55 and said, what was good about Python
0:57 and what things kind of gave people trouble,
0:59 what would be a nice way to clean up the language,
1:02 so that it's solid going forward,
1:04 and they made these breaking changes to Python 3
1:07 and expected people to move along pretty quickly.
1:10 Well, it's today, sometime in 2016 when this was recorded,
1:16 and there is still a debate, should people be using Python 2
1:19 or should they be using Python 3,
1:20 there is a lot of large code bases still running on Python 2,
1:23 the majority of large commercial applications are probably using Python 2,
1:28 even though it's been 8 years Python 3 has been out.
1:30 However, there is something on horizon
1:32 coming in 2020, they are going to make this a much simpler choice
1:37 between the two languages.
1:38 First of all, the changes between Python 3 and Python 2 are not that major,
1:44 if you write code in Python 3 chances are,
1:46 unless it's one of the advanced features "asyncio" or something like this,
1:50 chances are it's going to work fine in Python 2,
1:52 but there are older ways in Python 2 that are not forward compatible,
1:57 and I think that's actually the bigger problem.
1:59 So, if you learn Python 3 I feel like you have more well rounded
2:02 ability to jump into either type of project,
2:05 but that said, in 2020, just 4 short years from now,
2:10 Python 2 is going to be end of life.
2:13 No more bug fixes, not sure about security fixes,
2:16 but definitely no more support, and to drive that point home,
2:19 at PyCon, Guido Van Rossum, the guy who invented Python,
2:24 started out his keynote with this saying... "there will not be an extension to this policy",
2:30 this is it, only 4 years away before this being an absolutely clear choice,
2:34 Python 3 is the future,
2:36 and that's why this course is designed with Python 3 in mind.
2:40 So, in order to do this course, you are going to need to install Python 3.
2:45 And, we are going to talk about how to do that for each of the various operating systems.
2:50 One question, is maybe you already have Python 3,
2:52 maybe there is nothing to do,
2:53 so just knowing where Python is available,
2:55 that's kind of good background knowledge.
2:57 Before we get into details to set it up each on these operating systems,
3:00 let's answer the question-
3:02 If I have Windows, do I have Python?
3:04 No, you have no version of Python,
3:06 Windows does not ship with Python.
3:08 Unfortunately, it just doesn't.
3:10 So, if you have Windows, you have users who are using Windows,
3:14 you need to get them Python somehow, right?
3:17 On Linux, chances are at least on Ubuntu, you have both versions of Python,
3:22 that's pretty awesome, maybe it's not the absolute latest,
3:24 maybe it's 3.4 and 3.5, but still, pretty darn good.
3:29 OS X is somewhere in the middle,
3:31 typically you have Python 2, but you don't have Python 3.
3:35 A little like the choice between Python 2 and Python 3
3:38 is somewhat contentious in the Python community,
3:40 so as the editor you choose.
3:42 On one end of the spectrum you have people that use VI and Vim and Emacs,
3:47 and these very light weight sort of shell friendly, ssh friendly editors,
3:52 and that's actually a very large percentage
3:54 of the professional programmer's population for Python devs,
3:58 and on the other end,
4:00 you have IDEs rich, full featured, large applications
4:03 that bring all of your development tools together.
4:07 Sort of the premiere one of those, is the one I have here,
4:09 and the one I am recommending for the course is PyCharm,
4:12 but we'll see a few other options as well.
4:14 So, in editors like PyCharm you can edit of course and run your code,
4:18 you can run unit tests, code coverage,
4:21 look, you have a graphical visualizations of your git history and commit changes,
4:27 there is all sorts of stuff you can do here.
4:29 So I recommend to use PyCharm,
4:31 when we get to the particular operating systems we'll talk more about that.
4:34 But if for some reason you don't want to use PyCharm,
4:36 there are other options.
4:38 PyCharm has a free option for the community edition, but if you are on Windows,
4:43 you can also use Visual Studio and then plug in the Python tools for Visual Studio,
4:48 that's a nice free option, Microsoft has the community edition of Visual Studio
4:53 and then the Python tools are open source and free,
4:55 so that's a really good choice actually,
4:57 just a bare notch under PyCharm, but really good, if you are into the IDEs,
5:03 if you are not into the IDEs,
5:05 choose something like Sublime text or Atom by GitHub.