如何將'namedtuple'結構與'pickle'結合使用？

我已創建使用如何將'namedtuple'結構與'pickle'結合使用？

from collections import namedtuple 
import random 
demand={} 
Site_Product=namedtuple("Site_Product", ["site", "product"]) 
Products=['P1','P2','P3']  
for P in Products: 
    for node in range(1,4): #Suppliers: 
     sp=Site_Product(site=node, product=P) 
     demand={sp:random.normalvariate(30, 25)}

然後我想保存這些的情況下，字典的元組我如下可能會使用它以後：

import pickle 
PIK = "pickle_SC_detail.dat" 
with open(PIK, "wb") as f: 
    pickle.dump(demand, f)

我有一大堆的錯誤主要是指向我namedtuple結構：

File "C:\Users\Ozgu\Anaconda2\lib\pickle.py", line 1376, in dump 
    Pickler(file, protocol).dump(obj) 

    File "C:\Users\Ozgu\Anaconda2\lib\pickle.py", line 224, in dump 
    self.save(obj) 

    File "C:\Users\Ozgu\Anaconda2\lib\pickle.py", line 286, in save 
    f(self, obj) # Call unbound method with explicit self 

    File "C:\Users\Ozgu\Anaconda2\lib\pickle.py", line 655, in save_dict 
    self._batch_setitems(obj.iteritems()) 

    File "C:\Users\Ozgu\Anaconda2\lib\pickle.py", line 668, in _batch_setitems 
    save(k) 

    File "C:\Users\Ozgu\Anaconda2\lib\pickle.py", line 331, in save 
    self.save_reduce(obj=obj, *rv) 

    File "C:\Users\Ozgu\Anaconda2\lib\pickle.py", line 401, in save_reduce 
    save(args) 

    File "C:\Users\Ozgu\Anaconda2\lib\pickle.py", line 286, in save 
    f(self, obj) # Call unbound method with explicit self 

    File "C:\Users\Ozgu\Anaconda2\lib\pickle.py", line 568, in save_tuple 
    save(element) 

    File "C:\Users\Ozgu\Anaconda2\lib\pickle.py", line 286, in save 
    f(self, obj) # Call unbound method with explicit self 

    File "C:\Users\Ozgu\Anaconda2\lib\pickle.py", line 754, in save_global 
    (obj, module, name)) 

PicklingError: Can't pickle \<class '__main__.Site_Product'\>: it's not found as __main__.Site_Product

有一個變通無論是讓我的字典元組（鑰匙）或記錄我的數據以不昂貴的方式存在，以便它們共存？

來源

2016-04-13 Ozgu

複製你的兩個代碼片段，使用Python 2.7.11工作正常 – Skirrebattie

有問題的代碼適用於我在Windows上使用Python 2.7.11。你確定'Site_Product'是在真實代碼的頂層（不在函數或方法中）定義的嗎？ – martineau

是的，那肯定是問題所在！他們有不同的功能，我會盡力讓全球化或將它們聯合起來。 – Ozgu

事實證明，我是在兩個不同的函數中定義代碼。將它們結合起來很可能會解決問題。

來源

2016-04-13 13:28:24 Ozgu

如何將'namedtuple'結構與'pickle'結合使用？

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