I made a new folder /home/baker and then changed my write open() command to
f = open('/home/baker/MyFile.txt', w) and the read open command to f =
open('/home/baker/MyFile.txt', w) but still am not able to create and write
to the MyFile.txt. Now the getcwd() command tells me that the cwd is
/home/baker. Also not getting any error message even for writing or
reading, just the exception to reading the file that it cannot find the
file. No exception when I try to write to the file. I am running my Python
program with sudo python myprogram.py. I tried changing the permissions to
my /home/baker directory with "sudo chmod -R 777 /home/baker" but WinSCP
still says the owner is root and still my Python program cannot write a
text file to /home/baker.
So I'm at wits end (a short trip to be sure) and cannot figure out how to
write the data file.
John
On Tuesday, April 5, 2016 at 4:46:17 PM UTC-7, John Baker wrote:
>
> Thanks Paul.
> getcwd() tells me that my cwd is /home/debian/Desktop when I use f =
> open('MyFile.txt', w). I am using Try/Except and not getting an exception
> with the open() statement. Perhaps I can't write a text file to the
> Desktop, but it seems like it should give me an error message.
> John
>
> On 4/5/2016 3:19 PM, Paul Wolfson wrote:
>
> python
> >>> import os
> >>> os.getcwd()
> 'home/pwolfson'
> >>>
>
>
> -------------------------------------------------
> Paul Wolfson, Ph.D., TX LPI, #A17473
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> On Tue, Apr 5, 2016 at 6:13 PM, William Hermans <[email protected]
> <javascript:>> wrote:
>
>> *That's what I figured William. As far as I can tell, I am doing the open
>>> and write and read like I have with C and as described in
>>> https://docs.python.org/2/tutorial/inputoutput.html#reading-and-writing-files
>>>
>>> <https://docs.python.org/2/tutorial/inputoutput.html#reading-and-writing-files>.
>>>
>>> However, I am not getting any error message when I do the open for writing
>>> and do the write, just that the file is not getting created and written. It
>>> should be so straightforward but it's not working.*
>>>
>>
>> Does this file already exist ? You should check the documentation for the
>> file write() method and see what all is required for the method to work
>> correctly. Also, as I said I'm no python developer, but the code shown
>> there is really bad form. There is no error checking on the file object
>> when attempting the open() call. In C this would be done by checking the
>> value of f, but I'm not even sure this is possible in python.
>>
>> So I'd attempt to help you trouble shoot this by writing code myself,
>> here, and testing. But I'm very "allergic" to python. Or more correctly,
>> I'm getting old, and set in my ways, and python just is not in my future
>> plans. *ever* . . .
>>
>> On Tue, Apr 5, 2016 at 3:05 PM, John Baker < <javascript:>
>> [email protected] <javascript:>> wrote:
>>
>>> That's what I figured William. As far as I can tell, I am doing the open
>>> and write and read like I have with C and as described in
>>> https://docs.python.org/2/tutorial/inputoutput.html#reading-and-writing-files.
>>>
>>> However, I am not getting any error message when I do the open for writing
>>> and do the write, just that the file is not getting created and written. It
>>> should be so straightforward but it's not working.
>>> John
>>>
>>> On Tuesday, April 5, 2016 at 2:57:02 PM UTC-7, William Hermans wrote:
>>>>
>>>> I'm not a python developer, but actually have done this many times in
>>>> C. So I can tell you this with certainty. This is done no different than
>>>> it
>>>> is done on any Linux system.
>>>>
>>>> The point here is that you should go out and find any good python
>>>> tutorial, that covers writing to a file, and follow it.
>>>>
>>>> On Tue, Apr 5, 2016 at 1:43 PM, John Baker <[email protected]>
>>>> wrote:
>>>>
>>>>> I want to store a little data on the eMMC from my Python code. My
>>>>> program is not getting errors when I try to write a very short data file
>>>>> but it doesn't actually seem to write it as I cannot read it back. I am
>>>>> using
>>>>> f = open('MyFile.txt', w)
>>>>>
>>>>> or
>>>>> f = open('/home/debian/Desktop/MyFile.txt', w)
>>>>>
>>>>> or
>>>>> f = open('MyFile.txt', r)
>>>>>
>>>>> or
>>>>> f = open('/home/debian/Desktop/MyFile.txt', r)
>>>>>
>>>>> to open the file and am not getting any errors but Python is not
>>>>> finding the file and I cannot find the file with a search from WinSCP.
>>>>>
>>>>> So how to create a data file and where does it go?
>>>>>
>>>>> Thanks,
>>>>> John
>>>>> --
>>>>> For more options, visit <http://beagleboard.org/discuss>
>>>>> http://beagleboard.org/discuss
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>>>>>
>>>>
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