Python bin() Function

The bin() function is one of Python's built-in functions that converts an integer to its binary string representation.

Specifically, the bin() function returns a string containing the binary representation of the integer argument, prefixed with 0b.

For example:

print(bin(42))  # Output: '0b101010'

In this example, the integer 42 is converted to the binary string 101010 with the 0b prefix, resulting in the final output string 0b101010.

You can remove the 0b prefix using string slicing:

print(bin(42)[2:]) # Output: '101010'

If the argument is not an int object, it must define an __index__() method that returns an integer:

class mytype:

    def __index__(self):
        return 0

a = mytype()
print(bin(a))