Write down user input in a text file

Question

i tryed it with a basic html code like :

  <label for="fname">First name:</label><br>
  <input type="text" id="fname" name="fname" value="John"><br>
  <label for="lname">Last name:</label><br>
  <input type="text" id="lname" name="lname" value="Doe"><br><br>
  <input type="submit" value="Submit">
</form>

but then the input is saved like fname=John&lname=Doe

I wrote a script in python that gets the file xxx/xxx/display.txt when i use the basic html input function, the text will get saved as fname =john & sname=rober what i woud need is the string to get saved as john rober

how can i write the input down in the txt file without = and & , and how do i save it in the file, while overwriting everything previus in the txt file?