2012/9/14 Przemek Klosowski <przemek.klosow...@gmail.com>:
> On Fri, Sep 14, 2012 at 2:45 PM, Viesturs Lācis
> <viesturs.la...@gmail.com> wrote:
>
>>> Maybe check if the file exists, and if it does, open in append mode;
>>> otherwise open it normally for writing.
>>
>> Yes, that would be nice.
>> Can You share some source, where I can see, how does it look, when coded?
>
> As it turns out, opening the file in append mode creates it if it
> doesn't exist, so you can just do
>
> x=open("xyz","a")
> x.write("abc")

Thank You!

What is the syntax to put current date in the file name. In Your
example the file name is xyz.
And how can I specify the folder, in which the file is saved?


2012/9/15 cogoman <cogo...@optimum.net>:
> On 09/14/2012 03:53 PM, Stephen Dubovsky wrote:
>> Python can make database calls.  Just write the lengths to a database.
>>   Use database tools to do all the analysis like histogramming, etc.
>> Thats what they are very good at.
> Or, if the end user is handy with a spreadsheet, you could write it out
> to a .CSV file, and include the date and time so they could tell if data
> came before or after the power failure.  Of course for safety sake, you
> could close the file after each board is stored.

Yesterday I saw a video, where they demonstrated, how such a machine
is working. Each new piece of wood plank is created every 2 or 3
seconds. We agreed that saving to a file will be done, when operator
explicitly presses "save" button. So they are taking a risk that
powerfailure will cause a loss of unsaved data. I just cannot figure
out, how to create a reminder for operator to save data in case he/she
is trying to close application with some unsaved numbers.
Yes, saving to csv would be nice, but I think that I have a solution -
put in the rows some special characters, like semicolon, and then use
"text to columns" function in spreadsheet. What I am concerned about
is the coding of the file - most likely they will import the file in
excel on windows.

-- 
Viesturs

If you can't fix it, you don't own it.
http://www.ifixit.com/Manifesto

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