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TABLE 10.3 String-Testing Functions

The string-testing functions help when you need to validate input data that your scripts receive. If a
script requests a numeric value from the user, it’s a good idea to test what value the user enters before
actually using it in your code! You can try this out by creating a test script.

Try It Yourself: Test Strings

Try adding a string-testing feature to a small script by following these steps:

1. Open your favorite text editor and add the following code:
   Click here to view code image
   #!/usr/bin/python3

choice = input('Please enter your age: ')

if (choice.isdigit()):

print('Your age is ', choice)

else:

print('Sorry, that is not a valid age')

2. Save the file as script1001.py in your Python code folder.


3. From the command prompt, run the program:
   python3 sscript1001.py
   The script1001.py script uses the isdigit() string function to test the string