Deals Of The Week - hours only!Up to 80% off on all courses and bundles.-Close

Wrap course as a gift

Prepare your gift and double-check it looks just right.

Form validation errors

Recipient's Name:
Recipient's Email:
Your Message (Optional):
Proceed to Checkout

Working with Strings in Python

Introduction
Basic utility functions
6. The is...() functions—exercise
Basic manipulation functions
Replacing and splitting
Summary

Instruction

You did well! Some other popular is-functions available in Python are:

  • str.isalpha() – returns True if all characters in the string are letters.
  • str.isalnum() – returns True if all characters in the string are letters or digits.
  • str.isspace() – returns True if all characters in the string are whitespaces.
  • str.islower() and str.isupper() – return True if all characters in the string are lowercase/uppercase.

Let's do one more exercise with is-functions.

Exercise

John's calculations regarding translation prices have become more complicated. He is now paid the following:

  1. $0.03 for each letter.
  2. $0.02 for each digit.
  3. $0.01 for each whitespace character.

Modify the application so that it calculates the correct price. Print a single sentence:

The price is ${x}.

Stuck? Here's a hint!

Create three counters: one for letters, one for digits, and one for white spaces. Use the isdigit(), isalpha(), and isspace() functions.