How to Resolve Program Freezing Issue When Reading Keyboard Input in Python?

Keyboard Input Reading in Python

Reading data from the keyboard in Python can be a simple task, but encountering issues along the way is possible.

Issue:

After attempting to obtain keyboard input using the provided code:

<code class="python">nb = input('Choose a number')
print('Number%s \n' % (nb))</code>

the program freezes without any further actions.

Explanation:

The code provided uses the input function which reads input from the keyboard but returns it as a string. In the code, you further try to format it with a string using % and s placeholders, which is incorrect.

Solution:

To resolve this issue, you need to use the int function to cast the input to an integer data type:

<code class="python">nb = int(input('Choose a number'))
print('Number:', nb)</code>

Alternatively, if you are using Python 3, you can utilize the input function directly as it returns a string.

<code class="python">nb = input('Choose a number').strip()  # Remove trailing whitespace
print('Number:', nb)</code>

Additionally, if you wish to handle potential non-numeric inputs, you can incorporate exception handling:

<code class="python">try:
    nb = int(input('Choose a number'))
    print('Number:', nb)
except ValueError:
    print("Invalid input. Please enter a number.")</code>

The above is the detailed content of How to Resolve Program Freezing Issue When Reading Keyboard Input in Python?. For more information, please follow other related articles on the PHP Chinese website!