具有数据的cPickle类保存到文件 [英] cPickle class with data save to file
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问题描述
我在Python中有一个大类,它是类数据库"类.我想将其保存到文件-全部包括数据.
I've big class in Python it's "DataBase-like" class. I want to save it to file - all including data.
这是输入(显示问题的示例,在脚本数据库中类似10000条记录):
This is input(example to show the issue, in script database is like 10000 records):
import cPickle
# DataBase-like class
class DataBase:
class Arrays: pass
class Zones: pass
class Nodes:
class CR: pass
class Links:
class CR: pass
class Turns:
class CR: pass
class OrigConnectors: pass
class DestConnectors: pass
class Paths: pass
pass
# some basic input into database
DataBase.Arrays.Data=[]
for i in range(1000):
DataBase.Arrays.Data.append([i+4])
print DataBase.Arrays.Data[56]
# and now I want to save it to file
import cPickle
filename='D:/results/file.lft'
file=open(filename,'w')
cPickle.dump(DataBase, file, protocol=2)`
这就是我得到的文件:
€c__main__
DataBase
q.`
没有数据,只有定义.我该如何克服.也许将数据保存为类不是一个好主意吗?
There's no data, just definition. How can I overcome that. Maybe saving my data as a class is not a good idea?
推荐答案
您正在腌制作为类定义的"DataBase".您需要实例化DataBase类的对象,然后对其进行腌制.
You are pickling "DataBase" which is a class definition. You need to instantiate an object of class DataBase then pickle that.
objDataBase = DataBase()
objDataBase.Arrays.Data = etc....
filename='D:/results/file.lft'
file=open(filename,'w')
cPickle.dump(objDataBase, file, protocol=2)
file.close()
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