Modify the getfile.py used during class to allow user to enter a customized file name instead of fixed original file name. The interface should have three data controls: (1) The file Selector, which can be made by using <input name=file1 type=file > (2) The saving file name, which can be made by using <input name=fn > (3) The Submit button, which can be made by <input type=submit name=submit value=Upload > Don't use template. Submit the python program

Sure, here's an updated version of the `getfile.py` script that allows the user to enter a custom file name:

#!/usr/bin/env python
import cgi, os

# Set up the form and get user input
form = cgi.FieldStorage()
fileitem = form['file1']
filename = form['fn'].value

# Check if the file was uploaded
if fileitem.filename:
    # Set the path to save the uploaded file
    path = os.path.join(os.getcwd(), 'uploads', filename)

    # Save the uploaded file to the specified path
    with open(path, 'wb') as f:
        f.write(fileitem.file.read())

    # Print a success message
    print('Content-Type: text/html')
    print()
    print('<h1>File {} uploaded successfully!</h1>'.format(filename))
else:
    # Print an error message if no file was uploaded
    print('Content-Type: text/html')
    print()
    print('<h1>No file uploaded!</h1>')

To use this script, you would need to create an HTML form with the three data controls mentioned in the prompt:

<form method="post" enctype="multipart/form-data" action="getfile.py">
    <label for="file1">Select a file to upload:</label>
    <input type="file" name="file1" id="file1"><br>

    <label for="fn">Save file as:</label>
    <input type="text" name="fn" id="fn"><br>

    <input type="submit" name="submit" value="Upload">
</form>

In this form, the user can select a file to upload using the `file1` input control, enter a custom file name using the `fn` input control, and submit the form using the `submit` button. When the form is submitted, the `getfile.py` script will receive the file and file name data, and save the uploaded file to the specified path using the custom file name.