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Python Web Frameworks:

Django, Flask, Pyramid, Tornado, Bottle, Diesel, Pecan, Falcon

Flask:

Two external libraries:Werkzeug – Toolkit or W!"# $!tandard Pyt%on #nterace between &''lication and !er(er)*inja+ – Tem'late ngine $-enders tem'lates)

Advantages:

. asy to learn / im'lement

. "ood documentation

Installation:

'i' install Flask

Minimal Application:

rom lask im'ort Flaska'' 0 Flask $11name11)

2a''3route $454)de %ello $454):

return 46ello World74

i 11name11 00 411main114a''3run $)

What we did above?

. #m'orted Flask class

. 8reated a single module instance 411name114

. 9sed 4route4 decorator to tell w%at url s%ould trigger our 4%ello4 unction

. Deined a 4%ello4 unction $also %el'ul in generating t%e url later using url1or)

. 9sed 4run4 unction to run t%e local ser(er

Debug Mode:

a''3run $debug 0 True)

rl !uilding:

url1or$ 4unction1name4 ) generates t%e url corres'onding to t%e unction1name

rl Methods:

2b'3route $ 45login4, met%ods 0 4P;!T4, 4"T4, 4D

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rom lask im'ort Blue'rintb' 0 Blue'rint$4b'4, 11name11)g3 a''3register1blue'rint$b', url1'reix045cat.ui4)>a''ends cat.ui 'reix to all urls w%ile generating t%emurl1or$ 4b'3unction1name4 )

Why !lueprints?

. !u''orting common 'atterns t%roug%out t%e a''lication

. -egister deault 'reixes in a''lication url

. Pro(ide tem'late ilters, static iles, etc3

Demo:

. ?inimal &''lication

. Text box or sub.category c%ange

. ;(er(iew o Product 8atalog Tagging

Moving ahead with Pymongo:

. @addTo!et $To a''end a new item in a list o (alue o a ield)

. @grou' $&ggregates documents by desired key (alues)

. @matc% $?atc%es aggregated documents o(er a constraint)

. @'roject $"enerates desired names or Aueries)

"e#erences:

%tt':55lask3'ocoo3org5docs53C5Auickstart5>

%tt':55o'entec%sc%ool3git%ub3io5'yt%on.lask5

http://flask.pocoo.org/docs/0.10/quickstart/http://opentechschool.github.io/python-flask/http://opentechschool.github.io/python-flask/http://flask.pocoo.org/docs/0.10/quickstart/