Python练习题-007
题目-007：将一个列表的数据复制到另一个列表中
- 分析：有很多中方法，大概可分为以下2类：数值赋值（当a的数值发生改变时b不变）；地址赋值（当a的数值发生改变时b随之改变）；另外copy存在深拷贝和浅拷贝的问题
- Python版本：Python 3.6.5
代码1：
# A-1 数值赋值
a = [1,2,3]
b = a[:]
a[0] = 0
print(a,b)[0, 2, 3] [1, 2, 3]代码2：
# A-2 数值赋值
a = [1,2,3]
b = a*1
a[0] = 0
print(a,b)[0, 2, 3] [1, 2, 3]代码3：
# A-3 数值赋值
a = [1,2,3]
b = a.copy()
a[0] = 0
print(a,b)[0, 2, 3] [1, 2, 3]代码4：
# B-1 地址赋值
a = [1,2,3]
b = a
a[0] = 0
print(a,b)[0, 2, 3] [0, 2, 3]代码5：
# C:深拷贝与浅拷贝的问题-浅拷贝1
a = [1,2,3]
b = ["a","b",a]
c = b[:]
print(c)
a[0] = 10
print(c)['a', 'b', [1, 2, 3]]
['a', 'b', [10, 2, 3]]代码6：
# C:深拷贝与浅拷贝的问题-浅拷贝2
a = [1,2,3]
b = ["a","b",a]
c = b.copy()
print(c)
a[0] = 10
print(c)['a', 'b', [1, 2, 3]]
['a', 'b', [10, 2, 3]]# C:深拷贝与浅拷贝的问题-深拷贝
import copy
a = [1,2,3]
b = ["a","b",a]
c = copy.deepcopy(b)
print(c)
a[0] = 10
print(c)['a', 'b', [1, 2, 3]]
['a', 'b', [1, 2, 3]]