Python深淺copy

標籤：賦值   hid   lex   span   deepcopy   app   import   hide   div   

1 l1 = [1, 2, 3]2 l2 = l13 l1.append(‘a‘)4 print(l1, l2)       # 深cpoy5 6 l1 = [1, 2, 3]7 l2 = l1.copy()      # 淺拷貝8 l2.append(‘a‘)9 print(l1, l2)

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1.其他代碼

 1 # 賦值運算 2 # l1 = [1,2,3] 3 # l2 = l1 4 # l1.append(‘a‘) 5 # print(l1,l2) 6  7 #copy 8 # l1 = [1,2,3] 9 # l2 = l1.copy()10 # print(l1,l2)11 # print(id(l1),id(l2))12 # l2.append(‘a‘)13 # print(l1,l2)14 15 # l1 = [1,2,[4,5,6],3]16 # l2 = l1.copy()17 18 # print(l1,id(l1))19 # print(l2,id(l2))20 # l1.append(‘a‘)21 # print(l1,l2)22 # l1[2].append(‘a‘)23 # print(l1,l2)24 # print(id(l1[2]))25 # print(id(l2[2]))26 import copy27 # l1 = [1,2,[4,5,6],3]28 # l2 = copy.deepcopy(l1)29 # print(l1,id(l1))30 # print(l2,id(l2))31 # l1[2].append(‘a‘)32 # print(l1,l2)33 34 # l1 = [1,[1],2,3,4]35 # l2 = l1[:]36 # l1[1].append(‘a‘)37 #l2 的結果是什麼?38 39 40 # print(l1,id(l1))41 # print(l2,id(l2))42 # print(l1[1] is l2[1])43 44 # li = [‘alex‘,‘taibai‘,‘wusir‘,‘egon‘]45 # for i in li:46 #     print(li.index(i),i)47 48 # for index,i in enumerate(li,1):49 #     print(index,i)

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Python深淺copy