Understanding inputChoice() from PyInputPlus with Examples

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Complete Guide to inputChoice() in PyInputPlus

The inputChoice() function from PyInputPlus allows users to select from a predefined list of choices. It simplifies validation by ensuring input matches one of the allowed items.

🔹 Basic Usage

This example prompts the user to select one of the predefined items. If the input doesn't match, it will prompt again.

import pyinputplus as pyip

choice = pyip.inputChoice(['dog', 'cat', 'bird'])
print(f"You selected: {choice}")

What It Does:

  • Asks user to enter "dog", "cat", or "bird".
  • Rejects any other input.
  • Note: It has a default prompt like Please select one of: dog, cat, bird
  • Note: numbered is not supported in inputChoice()

Sample Output:

Please select one of: dog, cat, bird
moon
'moon' is not a valid choice.
Please select one of: dog, cat, bird
dog
You selected: dog

🔹 Custom Prompt

fruit = pyip.inputChoice(['apple', 'banana'], prompt="Pick your favorite fruit: ")
print(f"Chosen fruit: {fruit}")

What It Does:

  • Changes default prompt text.

Sample Output:

Pick your favorite fruit: banana
Chosen fruit: banana

🔹 Limit Attempts + Default Fallback

food = pyip.inputChoice(['pizza', 'burger'], limit=2, default='pizza')
print(f"Food selected: {food}")

What It Does:

  • User has 2 attempts to enter valid input.
  • If both fail, "pizza" (default) is returned.

Sample Output:

Please select one of: pizza, burger
hotdog
'hotdog' is not a valid choice.
Please select one of: pizza, burger
samosa
'samosa' is not a valid choice.
Food selected: pizza

🔹 Real-world Scenario: Confirm Action

confirm = pyip.inputChoice(['yes', 'no'], prompt="Are you sure you want to delete? (yes/no): ")
if confirm == 'yes':
    print("Deleted.")
else:
    print("Action canceled.")

Use Case:

  • Useful for confirmations before critical operations.

Conclusion: inputChoice() is a powerful and safe way to capture predefined responses, enhancing user experience and input validation.

📚 Related Topics from PyInputPlus:

“In the world of code, Python is the language of simplicity, where logic meets creativity, and every line brings us closer to our goals.”— Only Python

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