我有一本字典，正试图把它写成一个文件.
exDict = {1:1, 2:2, 3:3}
with open('file.txt', 'r') as file:
file.write(exDict)
那我就错了
file.write(exDict)
TypeError: must be str, not dict
所以我修正了那个错误，但又出现了另一个错误
exDict = {111:111, 222:222}
with open('file.txt', 'r') as file:
file.write(str(exDict))
错误是:
file.write(str(exDict))
io.UnsupportedOperation: not writable
我不知道该怎么做，因为我还是python的初学者.
注意:我使用的是python 3，而不是python 2
首先，以读取模式打开文件并try 写入.
其次，您只能将字符串写入文件.如果要编写字典对象，需要将其转换为字符串或序列化.
import json
# as requested in comment
exDict = {'exDict': exDict}
with open('file.txt', 'w') as file:
file.write(json.dumps(exDict)) # use `json.loads` to do the reverse
在序列化的情况下
import cPickle as pickle
with open('file.txt', 'w') as file:
file.write(pickle.dumps(exDict)) # use `pickle.loads` to do the reverse
对于python 3.x pickle包装进口将有所不同
import _pickle as pickle