python复习

标签：深拷贝   克隆   nihao   浅拷贝   not   深浅拷贝   复习   运算符   --   

身份运算符：is , is not
成员运算符：in , not in
1.深浅拷贝
s = [‘nihao ‘, 2]
s1 = s.copy()
print(s1)
print(s,s1)
<1>浅拷贝(只会copy第一层次)
b=a[:] #b=a.copy()
-------------------------------
s = [[1, 2], ‘nihao‘, 2]
d = s
print(id(s))
print(id(d))
#32285040
#32285040
-------------------------------
s = [[1, 2], ‘nihao‘, 2]
d = s.copy()
print(id(s))
print(id(d))
#6726000
#6797272
<2>s深拷贝（克隆一份）

python复习

标签：深拷贝   克隆   nihao   浅拷贝   not   深浅拷贝   复习   运算符   --   

原文地址：https://www.cnblogs.com/hq82/p/8901143.html