How to update a '.txt' file with filedialog

Question

How would I be able to create a '.txt' file and store some information from an entry box and be able to update the '.txt' file?

I understand that I would have to use:

file = filedialog.asksaveasfile( mode = 'w', defaultextension = '.txt')

and store the information form the Entrybox into the file:

#the self.nameEntry had the input of 'zack'
name = self.nameEntry.get()
file.write(name)
file.close()

But when the program continues to run and I want to save the new information into the same .txt file, how would I be able to accomplish that without using filedialog.asksaveasfile() all over again? Would I use file = open(file) and then use the file.write()?

Answer 1

I was able to understand how to do it...

Code:

file_name = filedialog.asksaveasfilename(defaultextension = '.txt')
if file_name is None:
    return
file = open(file_name, mode 'w')
name = self.nameEntry.get()
file.write(name)
file.close()

Thanks a lot to Kevin for helping me out with my problem :)