發表文章

目前顯示的是 3月, 2023的文章

郭怡吟Python集合set清單list元組tuple字典dictionary

圖片
w3schools練習截圖 w3schools程式碼 #郭怡吟集合set{},元組tuple(), 串列或清單list[], #字典dict{key:value,鍵:值} d = {2330:"台積電",2317:"鴻海",2454:"聯發科",6505:"台塑化"} s = {"台積電", "鴻海", "聯發科","台塑化"} t = ("台積電", "鴻海", "聯發科","台塑化") list = ["台積電", "鴻海", "聯發科","台塑化"] print(type(d),type(s),type(d),type(list)) print("台灣市場價值最大三家公司集合set列出") print(s) #練習迴圈 for a in s: print(a) """整個區塊註解前後加上連續三個引號 # Note: the set list is unordered, meaning: the items will appear in a random order. # Refresh this page to see the change in the result. """ w3schools集合方法 Python has a set of built-in methods that you can use on sets. Method Description add() Adds an element to the set clear() Removes all the elements from the set copy() Returns a copy of the set difference() Returns a set containing the difference between two or more sets diff...

郭怡吟w3schools字串str, format, slicing[::]

圖片
w3schools 程式碼 #郭怡吟strings可以用單引雙引只要對稱 b = '狗吃屎,兔吃菜,貓抓鼠,郭怡吟' # 0 1 23 4 5 678 9 10,11,12, print('字串長度' + str(len(b))) #len函數 字串長度 輸出 整數 #str函數 轉成字串 這樣才能串接 print(b[-5:-2]) #練習字串格式format quantity = "精華下午茶" itemno = 5 price = "郭怡吟" myorder = "我要吃 {} 吃幾個 {},和 {} 誰一起吃" print(myorder.format(quantity, itemno, price))