How to Resolve Keyboard Input Read Issues in Python Effectively?

How to Read Keyboard Input Effectively in Python

When attempting to read data from the keyboard in Python, some users may encounter issues where the program halts without displaying the expected output. To understand why this occurs, it's important to consider the syntax and usage of the input() function.

In Python 3 and above, the input() function is used to capture user input as a string. To use it correctly, simply call input() with a prompt as an argument to display to the user:

<code class="python">nb = input('Choose a number: ')
print('Number: {}\n'.format(nb))</code>

However, if you're using Python 2, you'll need to use raw_input() instead, as input() was introduced in Python 3.

Another issue that can arise is when you want to read a numeric value from the keyboard. By default, input() returns a string. To convert it to an integer, you can use the int() function:

<code class="python">try:
    mode = int(input('Input: '))
except ValueError:
    print("Not a number")</code>

Alternatively, you can use a type hint to specify the expected type of the input:

<code class="python">def get_number(prompt="Input: ") -> int:
    while True:
        try:
            return int(input(prompt))
        except ValueError:
            print("Please enter a number")</code>

This function will continuously prompt the user for input until a valid integer is entered.

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