dic={}
#赋值
dic['name']='lejoy'
dic['age']=26
或
dic={'name':'lejoy','age':26}
#取值
name=dic['name']
age=dic['age']
应为在python中dict是可变对象。用dic1赋值给dic3后,并没有创建一个新的对象,dic3和dic1指向同一个对象。通过dic3改变其内容,就如同通过dic1改变对象内容一样。
具体的内容你可以看看深拷贝和浅拷贝
import copydef com_weight(dic1,dic2):
dic3 = copy.deepcopy(dic1) #深拷贝,,,,
for i in dic1.keys():
for j in dic1[i].keys():
dic3[i][j]=dic1[i][j]-dic2[i][j]
print dic3
if __name__=='__main__':
dic1 = {1: {1: 142264, 2: 142315}, 2: {3: 142111}, 3: {3: 142723}}
dic2 = {1: {1: 142263, 2: 142312}, 2: {3: 142110}, 3: {3: 142722}}
print '__________________'
print dic1
print dic2
print '*******************'
com_weight(dic1, dic2)
print '~~~~~~~~~~~~~~~~~~~~~~~~'
print dic1
print dic2