python学习笔记之深浅copy

# 赋值运算
# l1 = [1,2,3]
# l2 = l1
# l1.append('a')
# print(l1,l2)

#copy
# l1 = [1,2,3]
# l2 = l1.copy()
# print(l1,l2)
# print(id(l1),id(l2))
# l2.append('a')
# print(l1,l2)

# l1 = [1,2,[4,5,6],3]
# l2 = l1.copy()

# print(l1,id(l1))
# print(l2,id(l2))
# l1.append('a')
# print(l1,l2)
# l1[2].append('a')
# print(l1,l2)
# print(id(l1[2]))
# print(id(l2[2]))
import copy
# l1 = [1,2,[4,5,6],3]
# l2 = copy.deepcopy(l1)
# print(l1,id(l1))
# print(l2,id(l2))
# l1[2].append('a')
# print(l1,l2)

# l1 = [1,[1],2,3,4]
# l2 = l1[:]
# l1[1].append('a')
#l2 的结果是什么?


# print(l1,id(l1))
# print(l2,id(l2))
# print(l1[1] is l2[1])

# li = ['alex','taibai','wusir','egon']
# for i in li:
#     print(li.index(i),i)

# for index,i in enumerate(li,1):
#     print(index,i)