[Tutor] Need help appending data to a logfile

[Matt D]

On 06/30/2013 10:52 AM, Alan Gauld wrote:
> On 30/06/13 15:04, Matt D wrote:
>>
>> that sounds ideal, but i have not found a way to pass the user selected
>> file into the loop that writes the data without opening another file.
> 
> Don;t pass the file pass the fgile *name*
> Then inside the update method open the file(in append mode)
> and write the latest update then close the file again. (Or
> use the 'with' paradigm which closes the file for you)
> Repeat as needed.
> 
> Part of the propblem is that you are openming the file right
> at the beginning and trying to pass the open file object
> around. Pass the filename and open when needed. Its slightly
> more resource intensive but a lot simpler.
> 
>> how would i use shutil to copy the tempory self.logfile into the user
>> selected file in this open fileFile()?:
> 
> The way to go is to only have one file and avoid all the
> copying stuff completely.
> 
im sorry i don't understand how to pass the file name from the open
dialog into the update method?  I'm sorry i just don't get it.   so if
the user opened file is 'handle' like this?:

 def openFile(self, evt):
        with wx.FileDialog(self, "Choose a file", os.getcwd(), "",
"*.txt*", wx.OPEN) as dlg:
           if dlg.ShowModal() == wx.ID_OK:
                path = dlg.GetPath()
                mypath = os.path.basename(path)
                with open('mypath', 'a') as handle:
                    self.handle = handle

Then i put 'handle' in the update() like this??:

def update(self, field_values, handle):
    logfile = open('handle.txt', 'a')

wait no 'handle' is already opened in the click event. so something like
 this:

def update(self, field_values, handle):
    self.logfile = open('logfile.txt' 'a')

    #logger code---------------
    self.logfile.write('\n')
    self.logfile.write('%s,'%(str(strftime("%Y-%m-%d %H:%M:%S",
localtime()))))
    for k,v in self.fields.items():
        f = field_values.get(k, None)
        if f:
            self.logfile.write('%s,'%(str(f)))
     #end logger code ----------------

     self.logfile = handle

I really have no idea how to go about implementing this idea of passing
the file name around in code.  Any suggestion will be much appreciated.
 Thanks.