Python Programming Essentials - M2 - Introduction to Python

Python Programming Essentials - M2 - Introduction to Python

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  http://www.skillbrew.com /SkillbrewTalent brewed bythe industry itself What is Python Pavan Verma 1 @YinYangPavan Python Programming Essentials
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  2 Hello World inPython
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  © SkillBrew http://skillbrew.com Briefhistory of Python  Invented by Guido Van Rossum in early 90s  Named after comedy group Monty Python  First public release in 1991  Open source from beginning  Managed by Python Software foundation (PSF) 3
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  © SkillBrew http://skillbrew.com PythonFeatures 4 • Python has relatively few keywords, simple structure, and a clearly defined syntax Easy-to-learn • Python lets you get more done with less code and less time Rapid development • One of Python's greatest strengths is the bulk of the library is portable and cross-platform compatible on *nix and windows Powerful standard library
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  © SkillBrew http://skillbrew.com PythonFeatures 5 • Python interpreter lets you try out code right away in its interactive mode Interactive mode • Python can run on a wide variety of platformsPortable • Python is a dynamically typed languages. Types are assigned at run-time Dynamically typed
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  © SkillBrew http://skillbrew.com Whouses Python 6
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  © SkillBrew http://skillbrew.com Whatdo people use Python for 7 Web and Internet Development Desktop GUIs Scientific and Numeric computing Network Programming Database Access
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  © SkillBrew http://skillbrew.com Someinteresting projects 8
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  © SkillBrew http://skillbrew.com PythonCommunity  Very active communities around Python and projects written in Python  PyPi – the Python Package Index, https://pypi.python.org/pypi 9
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  10 How does Pythoncompare with some other popular languages?
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  © SkillBrew http://skillbrew.com Pythonis better  Faster to learn  Portable code  Much smaller and compact code  Automatic garbage collection  Easy to find and install 3rd party libraries  More powerful standard library  5-10 times higher programmer productivity C/C++ is better  Faster 11 Python vs C/C++
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  © SkillBrew http://skillbrew.com Pythonis better  Faster to learn  Smaller and compact code  3-5 times higher programmer productivity Java is better  Faster 12 Python vs Java
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  © SkillBrew http://skillbrew.com Pythonis better  More versatile, general purpose language  Easy to find and install 3rd party libraries PHP is better  Faster to get started with  Cheap web hosting  Huge installed base 13 Python vs PHP
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  © SkillBrew http://skillbrew.com Pythonis better  More tidy & readable code  Proper support for objects oriented programming  More general purpose and adopted in variety of application domains Perl is better 14 Python vs Perl
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  © SkillBrew http://skillbrew.com Pythonvs Ruby  Python and Ruby have lot in common  Both are widely adopted in variety of application domains  Both have popular and successful applications written using them  Both have very active and supportive communities 15
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  16 Python Interpreter
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  © SkillBrew http://skillbrew.com Pythoninterpreter 17 • The interpreter is a program which lets you type in code and give outputs right away • This is a very easy and effective way to learn Python • This is where you will end up spending most of your time
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  © SkillBrew http://skillbrew.com Sneakpeak into an interpreter session 18 >>> x = 25 >>> y = 10 >>> x - y 15 >>> 4**2 # square of 4 16 >>> print "Python rocks" # print a string Python rocks >>> print "Python rocks".upper() PYTHON ROCKS
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  © SkillBrew http://skillbrew.com Sneakpeak into an interpreter session (2) 19 >>> 100/12 # divison 8 >>> colors = ['brown', 'black', 'orange'] >>> colors # a list of colors ['brown', 'black', 'orange'] >>>
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  © SkillBrew http://skillbrew.com AwesomeStandard Library 20 • Python ships with an extensive standard library • Hundreds of modules for doing a variety of things – interacting with the operating system, filesystem, Internet, and more • Well tested and widely used • Can greatly help jump-start development of your applications
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  © SkillBrew http://skillbrew.com •We will be using Python 2.7.x but even Python 2.5 and above will work • Examples, quiz and assignment all are meant to be done in Python 2.x • Please don’t use Python 3.x for this class due to backward compatibility issue Python Versions  Python 2.x  Python 3.x 21
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  © SkillBrew http://skillbrew.com Summary Brief history of Python  Python features  Who uses Python  What people use Python for  Some interesting projects written in Python  Comparison with other popular languages  Python interpreter 22
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  © SkillBrew http://skillbrew.com References List of application domains where Python is used http://www.Python.org/about/apps/  List of Internet companies that use Python http://www.quora.com/Python- programming-language-1/Which-Internet-companies-use-Python  Guido von Rossum personal home page http://www.Python.org/~guido/  Reddit site http://www.reddit.com/  Source code for reddit.com https://github.com/reddit/reddit  Pinterest site https://www.pinterest.com/ 23
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  © SkillBrew http://skillbrew.com References(2)  Blog post about Python in Disqus http://blog.disqus.com/post/51155103801/trying-out-this-go-thing  Blog post about Python in Instagram http://instagram- engineering.tumblr.com/post/13649370142/what-powers-instagram- hundreds-of-instances-dozens-of  Pygtk website http://www.pygtk.org/  TkInter GUI library https://wiki.Python.org/moin/TkInter 24
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  © SkillBrew http://skillbrew.com References(3)  PyGame Wikipedia page http://en.wikipedia.org/wiki/Pygame  OpenStack project website http://www.openstack.org/  Matplotlib website http://matplotlib.org/  Scipy website http://www.scipy.org/  Flask website http://flask.pocoo.org/  TurboGears on Wikipedia http://turbogears.org/  Django Project website https://www.djangoproject.com/ 25
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