Matt D wrote:
> On 06/24/2013 07:17 PM, Alan Gauld wrote:
>> On 24/06/13 23:05, Matt D wrote:
>>> I have been unable to find a way to write pickled data to text file.
>>
>> Probably because pickled data is not plain text.
>> You need to use binary mode. However...
>>
>>
>>> def __init__(self, data):
>>> wx.PyEvent.__init__(self)
>>> self.SetEventType (wxDATA_EVENT)
>>> # and this is the actual data
>>> self.data = data
>>> with open('mypicklelog.txt','a') as log:
>>> log.write(self.data)
>>
>> Since you are not using pickle here, all you are really doing
>> is trying to write whatever data is to a text file that
>> happens to have 'pickle' in its name.
>>
>> When writing to a text file you need to write strings.
>> You have no guarantee that 'data' is a string. You should
>> probably convert it before writing it. Thats one of the
>> advantages of using real pickles - they take care of
>> that complication for you.
>>
>>> I cant figure out why these last two line dont write to the .txt file
>>> after the program has received the pickled Python dictionary?
>>
>> Pickle data has to be unpickled before you can use it.
>> Before you can write it back again you need to repickle it.
>> The code you posted does not show you producing and pickled
>> data nor indeed you reading any pickled data...
>>
>> If 'data' is indeed in pickle format you cannot simply write
>> it to a text file since Pickle is not in a text format.
>>
>>
> im sorry; some more code will clarify i think ;
No, you aren't listening to Alan. The suggestive filename notwithstanding
> with open('mypicklelog.txt','a') as log:
> log.write(self.data)
will fail unless self.data is a string. Disregarding all other problems for
the moment, you need
with open('mypicklelog.txt','ab') as log: # open in binary mode
pickle.dump(self.data, log) # serialize data and write to file
where pickle.dump(obj, file) converts `obj` to a sequence of bytes before it
is written to `file`.
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