python - 用泡菜或莳萝保存类数据不起作用
问题描述
我想将轮询类数据的状态保存到文件中,如果我的脚本重新启动,则将其加载回来。我弹出了我的程序的一部分来复制这个问题。这是我的文件。
泡菜类.py
#POLL RECORD
class POLL:
title = ''
votes = {}
duration = 0
secenekler = 0
sure = ""
polltype = -1 # -1 initial, 0 = %, 1 = Sayi
chat_id = None
message_id = None
def reset():
POLL.title = ''
POLL.votes.clear()
POLL.duration = 0
POLL.secenekler = 0
POLL.sure = ""
POLL.polltype = -1
POLL.chat_id = None
POLL.message_id = None
fxns.py
def save_to_file(obj, filename):
"""
Saves obj to file named with fn as pickly object.
"""
import pickle
with open(filename, 'wb') as output: # Overwrites any existing file.
pickle.dump(obj, output, pickle.HIGHEST_PROTOCOL)
def load_from_file(fn):
import pickle
"""
reads from file given in fn and returns object of dump pickle file
"""
return pickle.load( open( fn, "rb" ) )
保存.py
import pickleclass as pk
import fxns as fxn
Poll_file = "p.dump"
poll = pk.POLL
poll.title = "TEST TITLE"
poll.votes['VOTE 1'] = 1
poll.votes['VOTE 2'] = 2
poll.votes['VOTE 3'] = 3
poll.duration = 0.4
poll.secenekler = 1
poll.sure = "23:55"
poll.polltype = 1
poll.chat_id = 112431
poll.message_id = 324
print("-"*55)
print("-"*55)
bozo = vars(poll)
for key in bozo.keys():
print(key, "=", bozo[key])
print("-"*55)
fxn.save_to_file(poll, Poll_file)
首先我调用 save.py 来创建类,然后保存它。它成功结束。在 save.py 脚本之后,我调用 load.py 来加载保存的内容。但它加载空类数据。因为它是新创建的。save.py 文件的输出如下:
('reset', '=', <function reset at 0x7f4485277758>)
('__module__', '=', 'pickleclass')
('sure', '=', '23:55')
('secenekler', '=', 1)
('title', '=', 'TEST TITLE')
('__doc__', '=', None)
('votes', '=', {'VOTE 2': 2, 'VOTE 3': 3, 'VOTE 1': 1})
('polltype', '=', 1)
('chat_id', '=', 112431)
('duration', '=', 0.4)
('message_id', '=', 324)
加载.py
import pickleclass as pk
import fxns as fxn
Poll_file = "p.dump"
zozo = fxn.load_from_file(Poll_file)
zozo = vars(zozo)
for key in zozo.keys():
print(key, "=", zozo[key])
print("-"*55)
print("-"*55)
当我加载文件并显示输出时,它是空的,如下所示。
('reset', '=', <function reset at 0x7f8e99907758>)
('__module__', '=', 'pickleclass')
('sure', '=', '')
('secenekler', '=', 0)
('title', '=', '')
('__doc__', '=', None)
('votes', '=', {})
('polltype', '=', -1)
('chat_id', '=', None)
('duration', '=', 0)
('message_id', '=', None)
我找不到问题所在。它加载类但不加载数据。
解决方案
加载已正确执行:问题来自您未正确实现的类。
查看有关类和实例的一些材料(或SO 上的一些帖子),尤其是__init__
函数、、self
实例和类成员等概念(另请参阅该帖子中密切相关的问题)。
然后看看如何pickle
处理类,你应该很高兴。
显然编辑dill
这实际上应该是可能的,看到这个 SO post