File Dialog ask save as file

Question

I'm trying to use the following in my GUI

def SaveFile():
sf = filedialog.asksaveasfile(defaultextension=".txt",
                              mode='w',
                              filetypes=[
                                ("Text file", ".txt"),
                                ("HTML file", ".html"),
                                ("All files", ".*"),
                                ])

sf=u'\u003c'
sf.encode('utf8')
if sf is None:
    return
sf.write('\n'.join(listbox2.get(0,END)))
sf.close()

I get this error:

 sf.write ('\n'.join(listbox2.get(0,END)))
 ^^^^^^^^
AttributeError: 'str' object has no attribute 'write'

If I use this its works fine, BUT I can't use a custom name for the said file.

with open("Name.txt", "w", encoding="utf-8") as file:
    file.write('\n'.join(listbox2.get(0, END)))

Any Idea what I'm not doing right? I've searched here and asked on other forums with no answers.

Answer 1

filedialog.asksaveasfile() produces a TextIOWrapper which contains a property name. You can use sf.name instead of "Name.txt".

You could also use:

with sf:
    sf.write(...)

or

sf.write(...)
sf.close()

as you attempted.

Or at least you could if you didn't overwrite sf with sf=u'\u003c'.

Answer 2

Thanks, Bryan Oakley and Minty. I changed asksaveasfile to asksaveasfilename. Here is my now working function.

def SaveFile():    
try:
    file1=filedialog.asksaveasfilename(filetypes=
                                [("text file", "*.txt"),
                                 ("HTML file", ".html"),
                                 ("All files", ".*")],
                                  defaultextension=".txt")
    sf=open(file1, 'w', encoding='utf-8')
    sf.write("\n".join(listbox2.get(0, END)))
    if sf is not None:
        return
except Exception as e:
    print("An error occurred:", e)
    sf.close()