problem with read() write()

[Alf P. Steinbach]

* Zeynel:
> On Oct 31, 9:23 am, "Alf P. Steinbach" <al... at start.no> wrote:
>> * Zeynel:
>>
>>
>>
>>
>>
>>> Hello,
>>> I've been studying the official tutorial, so far it's been fun, but
>>> today I ran into a problem with the write(). So, I open the file pw
>>> and write "hello" and read:
>>> f = open("pw", "r+")
>>> f.write("hello")
>>> f.read()
>>> But read() returns a bunch of what looks like meta code:
>>> "ont': 1, 'center_insert_even\xc4\x00K\x02\xe8\xe1[\x02z\x8e
>>> \xa5\x02\x0b
>>> \x00\x00\x00\x00\x00\x00\x00\x08\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x0 0'QUEUE'\np1\n
>>> (S'exec' ....
>>> What am I doing wrong? Thank you.
>> After the 'write' the current position in the file is after the "hello", so
>> reading will read further content from there.
>>
>> The following works (disclaimer: I'm utter newbie in Python, and didn't consult
>> the documentation, and it's the first time I've seen the Python 'open'):
>>
>> f = open("pw", "r+")
>> f.write( "hello" )
>> f.seek( 0 )  # Go back to start of file
>> f.read()
>> f.close()
>>
>> Cheers & hth.,
>>
>> - Alf
> 
> Thanks, but it didn't work for me. I still get the meta file. Although
> I see that "hello" is there.

Just a thought: try "w+" instead of "r+".

Because if you do

   print( open.__doc__ )

as I recall it said something about "w" truncating the file?


Cheers & hth.,

- Alf