Can You Prefill Python Input Fields with Default Values?

Default Value Input with Python Prefix

Can Python input fields have a default value that can be edited by the user? For example, you might want a prompt that suggests a folder name like "Download" but allows the user to change it by adding a character or two.

Traditional input commands like folder=input('Folder name: ') only display a blank prompt. Is there a simple way to realize this default value behavior?

The standard input functions input() and raw_input() lack this functionality. However, the readline module in Linux provides advanced input capabilities. Here's a custom input function using readline:

import readline

def rlinput(prompt, prefill=''):
    readline.set_startup_hook(lambda: readline.insert_text(prefill))
    try:
        return input(prompt)  # or raw_input in Python 2
    finally:
        readline.set_startup_hook()

This function takes two parameters:

• prompt: The prompt text displayed to the user.
• prefill: The default value to prefill in the input field.

When the user presses Enter, the function returns the input text, including any edits made by the user.

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