On 06/17/2013 01:36 PM, Matt D wrote:
Hey, I wrote some simple code to write data to a logfile and it works pretty well (thanks guys). Now my problem is that every time i run the program the old logfile.txt is overwritten. I need to be able to stop and start the program without overwriting, or losing, the old data. here is the relavent code:# central part of the program # lays out the GUI panel # omitted lots for our purposes here Class panel(wx.Panel): # open a file named "logfile.txt" in "w" writing mode. # this will create the file if it doesn't exist. self.logfile = open('logfile.txt', 'w') # Updates the TextCtrl field values # and logs TextCtrl field values def update(self, field_values): #logger code--------------- #first write the CURRENT date/time self.logfile.write('%s,'%(str(strftime("%Y-%m-%d %H:%M:%S", gmtime())))) # loop through each of the TextCtrl objects for k,v in self.fields.items(): #get the value of the current TextCtrl field f = field_values.get(k, None) if f: #output the value with trailing comma self.logfile.write('%s,'%(str(f))) self.logfile.write('\n') #end logger code ---------------- In addition to not deleting the old data, it would be awesome to have some sort of wxPython widget that would give the user the ability to 'save as', or name and save the file, from the GUI panel. Thanks!
Clearly you didn't absorb or act on much of the advice from the last time. So this time I'll just give you a brief hint.
Don't use write mode when opening the file. Find the docs on open(), and see what other choices there are.
-- DaveA _______________________________________________ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
