Newbie prob: How to write a file with 3 threads?

[Gary Herron]

est wrote:
> On May 7, 5:12 am, MRAB <goo... at mrabarnett.plus.com> wrote:
>   
>> On May 6, 9:51 am, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:> In <1178440537.257526.40... at y5g2000hsa.googlegroups.com>, est wrote:
>>     
>>>> I need to write a file using 3 threads simutaniously, e.g. Thread 1
>>>> write the first byte of test.bin with an "a", second thread write the
>>>> second byte "b", third thread write the third byte "c". Anyone could
>>>> give a little example on how to do that?
>>>>         
>>> Simplest solution is: don't do that.  Write from one thread and send the
>>> date from the other threads via a `Queue.Queue` to the writing thread.
>>> Send the number of the thread with the data so the writer thread knows in
>>> which order the data has to be written.
>>>       
>> [snip]
>> Or have a `Queue.Queue` for each source thread and make the writer
>> thread read from each in turn.
>>     
>
>
> I'll try Queue.Queue, thank you. I didn't expect that multithread
> write a file is so troublesome
>   

As a general rule, *ALL* multithread operations are at least that
troublesome, and most are far more so.

Pessimistically-yours,
Gary Herron