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1、1你好#打開新窗口,輸入:#!?/usr/bin/python#?-*-?coding:?utf8?-*-?s1=input("Input?your?name:")print("你好,%s"?%?s1)'''知識點:????*?input("某字符串")函數(shù):顯示"某字符串",并等待用戶輸入.????*?print()函數(shù):如何打印.????*?如何應用中文???*?如何用多行注釋'''????2字符串和數(shù)字但有趣的是,在javascript里我們會理想當然的將字符串和數(shù)字連接,因為是動態(tài)語言嘛.但在Py
2、thon里有點詭異,如下:#!?/usr/bin/pythona=2b="test"c=a+b運行這行程序會出錯,提示你字符串和數(shù)字不能連接,于是只好用內(nèi)置函數(shù)進行轉(zhuǎn)換#!?/usr/bin/python#運行這行程序會出錯,提示你字符串和數(shù)字不能連接,于是只好用內(nèi)置函數(shù)進行轉(zhuǎn)換a=2b="test"c=str(a)+bd="1111"e=a+int(d)#How?to?print?multiply?valuesprint?("c?is?%s,e?is?%i"?%?(c,e))'''知識點:????*?用
3、int和str函數(shù)將字符串和數(shù)字進行轉(zhuǎn)換????*?打印以#開頭,而不是習慣的//????*?打印多個參數(shù)的方式????'''3列表#!?/usr/bin/python#?-*-?coding:?utf8?-*-#列表類似Javascript的數(shù)組,方便易用#定義元組word=['a','b','c','d','e','f','g']#如何通過索引訪問元組里的元素a=word[2]print?("a?is:?"+a)b=word[1:3]print?("b?is:?")print?(b)?#?index?
4、1?and?2?elements?of?word.c=word[:2]print?("c?is:?")print?(c)?#?index?0?and?1?elements?of?word.d=word[0:]print?("d?is:?")print?(d)?#?All?elements?of?word.#元組可以合并e=word[:2]+word[2:]print?("e?is:?")print?(e)?#?All?elements?of?word.f=word[-1]print?("f?is:?")p
5、rint?(f)?#?The?last?elements?of?word.g=word[-4:-2]print?("g?is:?")print?(g)?#?index?3?and?4?elements?of?word.h=word[-2:]print?("h?is:?")print?(h)?#?The?last?two?elements.i=word[:-2]print?("i?is:?")print?(i)?#?Everything?except?the?last?two?charactersl=len
6、(word)print?("Length?of?word?is:?"+?str(l))print?("Adds?new?element")word.append('h')print?(word)#刪除元素del?word[0]print?(word)del?word[1:3]print?(word)'''知識點:????*?列表長度是動態(tài)的,可任意添加刪除元素.????*?用索引可以很方便訪問元素,甚至返回一個子列表????*?更多方法請參考Python的文檔'''4字典#!?/usr/bin/pytho
7、nx={'a':'aaa','b':'bbb','c':12}print?(x['a'])print?(x['b'])print?(x['c'])for?key?in?x:????print?("Key?is?%s?and?value?is?%s"?%?(key,x[key]))????'''知識點:????*?將他當Java的Map來用即可.'''5字符串比起C/C++,Python處理字符串的方式實在太讓人感動了.把字符串當列表來用吧.#!?/usr/bin/pythonword="abcdefg"a
8、=word[2]print?("a?is:?"+a)b=word[1:3]print?("b?is:?"+b)?#?index?1?and?2?elements?of?word.c=word[:2]print?("c?is:?"+c)?#?index?0?and?1?elements?of?word.d=word[0:]print?("d?is:?"+d)?#?All?elements?of?word.e=word[:2]+w