Python bin() built-in function
From the Python 3 documentation
Convert an integer number to a binary string prefixed with “0b”. The result is a valid Python expression. If x is not a Python int object, it has to define an __index__() method that returns an integer.
Introduction
The bin() function converts an integer into its binary representation. The resulting string is prefixed with “0b” to indicate that it’s a binary number.
Examples
Here are a few examples of how to use bin():
# Convert integers to binary
print(bin(2)) # Output: 0b10
print(bin(7)) # Output: 0b111
print(bin(1)) # Output: 0b1
print(bin(10)) # Output: 0b1010
print(bin(100)) # Output: 0b1100100
print(bin(1000)) # Output: 0b1111101000