2010 08-19-30 minutes of python

30 minute of Python30 minute of Python

NameName :: Kang-min Wang ( Aminzai )Kang-min Wang ( Aminzai )DateDate :: 2010/08/192010/08/19EmailEmail :: aminzai –at-- aminzai.netaminzai –at-- aminzai.net

2010/08/09 30 minutes Python

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OutlineOutline

● 迷漾的 Outline....


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What's Python?What's Python?

一條蟒蛇？


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What's Python?What's Python?


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HistoryHistory

● Python 的創始人為吉多 · 范羅蘇姆。在 1989 年聖誕節期間的阿姆斯特丹，吉多為了打發聖誕節的無趣，決心開發一個新的指令碼解釋程式● 我們究竟在幹嘛阿 ...


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Who use it?Who use it?

● Google● Youtube● BitTorrent● NASA● OLPC● Plurk● Me 0.0\-/

2010/08/09 30 minutes Python 7


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Why Google use it?Why Google use it?

● 由於 Python 對於 C 和其他語言的良好支援，很多人還把 Python 作為一種「膠水語言」（ glue language ）使用。使用 Python 將其他語言編寫的程式進行整合和封裝。


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Python's Core ideologyPython's Core ideology

● There is only one way to do it.要做好一件事，一種方法就夠了。

● Everything is object.萬物皆物件

● Readability counts.可讀性優先

● Explicit is better than implicit.明顯比隱晦好

● Simple is better than complex.簡單比複雜好


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AdvantageAdvantage

● 簡單易讀● 開發快速● 易於協同開發● 很快就可以上手● 記憶體回收機制● 養成良好習慣


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ShortcomingShortcoming

● 速度仍然比 C 慢● 有些超級老的 cpu 不能跑● 有些模組比較肥 (xml 相關 )


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Develop EnviormentDevelop Enviorment

● Eclipse + pyDev● Python IDLE● Vim <== 我在用的 XD


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11stst example example

Hello, World!


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NumbersNumbers

● 整數 (int)● 浮點 (float)● 長整數 (long)● 八進位與十六進位● 複數 (complex)● 布林值 (bool)


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OperationOperation

● + - * / ** //...● 遵守四則運算規則● 數學函式： pow abs...● Modules : random math...● 轉換進制： oct() hex()....

from decimal import DecimalDecimal()

● 集合 set()


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StringString

● 字串 (str)● Raw● Unicode● byte(in Python 3.0)● + *...● len() ● slice notation● Replace ,Upper....


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Slice(array)Slice(array)

S L I C E

0 1 2 3 4 5

[: :]

[ 起使：終止：步進 ]


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ListList

● [ 'abc', 123 , [ 'a' , 'b' ] ]● 可任意巢狀化，不限定型態


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TupleTuple

● ( 'abc', 123 , [ 'a' , 'b' ] )● 內含物不可變更的 list


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Dict (Dict (Dictory)Dictory)

● { 'name' : 'billy3321' ,'jobs' : ['student', 'maintainer'], 'develop' : {'name' : 'lazybuntu', 'OS' : 'Ubuntu' } }

● Key : Value● 無序集合體，以 key存取● 以 hash table實作


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File I/OFile I/O

● myfile = open('myfile', 'w')myfile.write('Hello, World!')myfile.close()

● myfile = open('myfile', 'r')myfile.readline()myfile.readline()myfile.readline()myfile.readlines()myfile.close


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Dynamic type?Dynamic type?

● 整數，字串是不能改的？我明明就可以改他啊！● A = 3B = Aprint A , BA = 'hello'print A , B

● Refrence(參照值 ) → object( 物件 )● 屬性是屬於物件的，而變數就是參照值● [ 'abc' , [(1, 2), ([3],4)],'def']


[ 'abc' , [(1, 2), ([3],4)],'def']

'abc' (1, 2) ([3],4) 'def'

1 2 [3] 4

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Let's think!為什麼縮排？


給你三秒鐘


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給你三秒鐘給你三秒鐘 !!!!

if (x) if (y)

statement1;else statement;

else statement2;


看完了嘛？


縮排是 Python 的其中一重點！


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縮排縮排

● 可讀性優先 ; readability counts● 把習慣養好● 方便大家協同作業，大家的程式碼一目瞭然。

●While loopWhile loop

● while true: print "Spam"else print "Aminzai"

● while i < 5: i = i + 1 print i

● countinue break pass else

●For loopFor loop

● for i in lists: print i

● for line in open('file'):● 如果要反覆特定次數：搭配 range()

for i in range(5) print "Spam"

FunctionFunction

● def print_aminzai(): print "Aminzai"

print_aminzai()● 利用 return 回傳值● 注意：變數所存在之範圍內建＞廣域＞函式＞區域

ObjectObject

● class Person: def __init__(self, name, job): self.name = name self.job = job def info(self): return (self.name, self.job)

aminzai = Person(‘Aminzai’, ‘student’)aminzai.jobaminzai.info()

ObjectObject

● class man(Person): self.sex = male

aminzai = man(‘aminzai’, ‘student’)aminzai.sexaminzai.info()


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DocumentDocument

● help()● dir()● Pydoc● 說明文件和程式碼放在一起


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Fire Show!!Fire Show!!

● Plurk BOT● http://www.plurk.com/isu_ann

● Lazyscripts● http://lazyscripts.org

● Google App Engines● Geeklothes

– http://geeklothes-tw.appspot.com● ECG Waveform

– http://isucsieeslabecg.appspot.com/SWF● Conference Joke

– http://confjoke.appspot.com/

http://isucsieeslabecg.appspot.com/SWF


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ResourceResource

● PyTUG:www.python.org.tw● irc.://irc.freenode.net/#python.tw● Ptt Python討論版● http://www.python.org/


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2010 08-19-30 minutes of python

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