Question

我正在尝试使用python中提供的'dump'命令将字典转换为pickle格式。字典的文件大小约为150 MB，但只有115 MB的文件被转储时才会出现异常。例外是：

Traceback (most recent call last): 
  File "C:\Python27\generate_traffic_pattern.py", line 32, in <module> 
    b.dump_data(way_id_data,'way_id_data.pickle') 
  File "C:\Python27\class_dump_load_data.py", line 8, in dump_data 
    pickle.dump(data,saved_file) 
  File "C:\Python27\lib\pickle.py", line 1370, in dump 
    Pickler(file, protocol).dump(obj) 
  File "C:\Python27\lib\pickle.py", line 224, in dump 
    self.save(obj) 
  File "C:\Python27\lib\pickle.py", line 286, in save 
    f(self, obj) # Call unbound method with explicit self 
  File "C:\Python27\lib\pickle.py", line 649, in save_dict 
    self._batch_setitems(obj.iteritems()) 
  File "C:\Python27\lib\pickle.py", line 663, in _batch_setitems 
    save(v) 
  File "C:\Python27\lib\pickle.py", line 286, in save 
    f(self, obj) # Call unbound method with explicit self 
  File "C:\Python27\lib\pickle.py", line 600, in save_list 
    self._batch_appends(iter(obj)) 
  File "C:\Python27\lib\pickle.py", line 615, in _batch_appends 
    save(x) 
  File "C:\Python27\lib\pickle.py", line 286, in save 
    f(self, obj) # Call unbound method with explicit self 
  File "C:\Python27\lib\pickle.py", line 599, in save_list 
    self.memoize(obj) 
  File "C:\Python27\lib\pickle.py", line 247, in memoize 
    self.memo[id(obj)] = memo_len, obj 
MemoryError

我真的很困惑，因为我的相同代码工作得很好。

Answer 1

你只是倾销那一个对象，而这就是全部吗？

如果您多次调用dump，那么在转储之间调用Pickler.clear_memo()将刷新内部存储的反向引用（导致'泄漏'）。你的代码应该可以正常工作......

Answer 2

你试过这个吗？

import cPickle as pickle
p = pickle.Pickler(open("temp.p","wb")) 
p.fast = True 
p.dump(d) # d is your dictionary

在python中pickling数据时的MemoryError

2 个答案: