python-copy模块使用

浅拷贝

import copy
dic = {
    "cpu":[80,],
    "mem":[80,],
    "disk":[80,]
    }
print('brefore:',dic)
new_dic = copy.copy(dic)
new_dic['cpu'][0] = 50
print(dic)
print(new_dic)

#brefore: {'disk': [80], 'mem': [80], 'cpu': [80]}
#{'disk': [80], 'mem': [80], 'cpu': []}
#{'disk': [80], 'mem': [80], 'cpu': []}

深拷贝

import copy
dic = {
    "cpu":[80,],
    "mem":[80,],
    "disk":[80,]
    }
print('brefore:',dic)
new_dic = copy.deepcopy(dic)
new_dic['cpu'][0] = 50
print(dic)
print(new_dic)

#brefore: {'disk': [80], 'cpu': [80], 'mem': [80]}
#{'disk': [80], 'cpu': [], 'mem': [80]}
#{'disk': [80], 'cpu': [], 'mem': [80]}