python筆記一

標籤：標準輸出   tabs   you   對象   win   有序   位置   學習   abs   

字串學習---------- input互動輸入----------

name = input( ‘please enter your name:‘ )print (name)

---------- input 互動輸入計算----------

value1 = 1024 * 512value2 = input(‘num1:‘)value3 = input(‘num2:‘)print (value1)print (value2)print (value3)print (value1 * value2)print (value1 * value3)#當value2 * value3的時候不能如上表示

---------- in 判斷變數/值中包含的字串----------

s = "Wind and cloud"weather1 = "Wind" in sweather2 = "SB" in sprint (weather1)print (weather2)

---------- 變數元組 ----------

Wind = "weather1"Paul = "name"Rain = "weather2"_Coll_1 = [‘Wind‘,‘Paul‘,‘Rain‘]print(_Coll_1)_Cont_1 = "Wind" in _Coll_1print (_Cont_1)

---------- type 查看對象的類,一般字串都是標準輸入----------

temp1 = "123"_123_io = type(temp1)print(_123_io)temp2 = "hey"_hey_io = type(temp2)print(_hey_io)

---------- dir 查看功能----------

temp = "wind"print(dir(temp))

---------- upper 小寫轉換成大寫----------

temp = "wind"print(temp.upper())

---------- count 字串統計一定要在一對引號之內的字串----------

_name_coll = ("paul,vencent,sunny,anny,should,bilibili,david,paul")_coll = _name_coll.count("nn")print(_coll)

---------- endswith 字串尾部輸出定義----------

temp = "hello"print(temp.endswith(‘e‘,0,2))    #字串的0-2的字元he，是以e結尾，0也可以寫成1

---------- center 佔位輸出----------

a1 = "alex"a2 = a1.center(20,‘*‘)print(a2)#字元總數20個，以alex為中心，兩邊以*號填充

---------- count 統計指定字串數量----------

a1 = "alex is alpa"a2 = a1.count(‘al‘,5,12)print(a2)

---------- expandtabs 分隔字元設計20位----------

content = "hello\t123"print(content)print(content.expandtabs())print(content.expandtabs(20))

---------- find 字串位元尋找

s = "alex hello"print(s.find("h"))print(s.find("p"))#找不到的字元，會顯示負數

---------- str 字串標準輸出，字串位置輸出定義

str = ‘Runoob‘print  (str[0:3])print (str[0])print (str[2:5])print (str[2:])print (str * 2)print (str + "TEST")

---------- \n 本身是分行符號，r將字串中特殊字元轉化為一般字元

print(‘Ru\nnoob‘)print(r‘Ru\nnoob‘)

---------- format 佔位替換，有序排列

x = "hello {0}, age {1}"print(x)y = x.format("paul","27")print(y)

---------- join

alex = "name1"should = "name2"paul = "name3"dio = "name5"name = [alex ,should ,paul ,dio]_name_join = "".join(name)print(_name_join)#將值變成一個整體字串輸出,如果不用元組，只是字串，可以使用雙引號把字串引起來，加入空格，是字串相互隔開。name = "alex ","should ","paul ","dio "print (name)_name_join = "".join(name)print(_name_join)

---------- replace 替換字串

x = "alex is alex"y = x.replace("al","AA")print(y)

---------- split 對字串進行切片分隔

x = "alex\nalex"y = x.split()print(y)

python筆記一