15列表推导式
列表推導式：用一行代碼構建一個比較復雜有規律的列表
lst = [] for i in range(0,10,2): # 循環0-10里面所有數字 每次遞增2個數字lst.append(i) # 把 i 追加進 lst空列表 print (lst) # [0, 2, 4, 6, 8] # 生成一個列表，從gpc love1 una 開始裝，一直到99. lst = ["gpc love%s una"%i for i in range (100)] print (lst) # #['gpc love0 una', 'gpc love1 una', 'gpc love2 una', 'gpc love3 una',.... 'gpc love99 una'] lst = [i for i in range(10) if i % 2 == 1 ] # 列表推導式 print(lst) #[1, 3, 5, 7, 9] lst = ["王健林","王思聰","馬云","馬化騰"] # 字典推導式 # {0:王健林,1:王思聰,2:馬云。。。} dic = {i:lst[i] for i in range (len(lst))} print (dic) #{0: '王健林', 1: '王思聰', 2: '馬云', 3: '馬化騰'} lst = [1,1,2,3,3,4,5,5,5] # 集合推導式 s = {i for i in lst} print (s) # {1, 2, 3, 4, 5} g = (i for i in range(10)) #生成器 print (g) #<generator object <genexpr> at 0x000001C6A34BC2A0> print(g.__next__()) # 0 print(g.__next__()) # 1 print ("-"*30) for item in g: #拿空一個生成器數據print (item) # 2 3 4 5 6 7 8 9 #100以內所有能被3整除得數得平方 lst = [i**2 for i in range(100) if i % 3 ==0] print (lst) # [0, 9, 36, 81, 144, 225, 324, 441, 576, 729, 900, 1089, 1296, 1521, 1764, 2025, 2304, 2601, 2916, 3249, 3600, 3969, 4356, 4761, 5184, 5625, 6084, 6561, 7056, 7569, 8100, 8649, 9216, 9801]總結
