Python bin()

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The bin() is a built-in function in Python that takes an integer and returns the binary equivalent of the integer in string format. If the given input is not an integer, then the __index__ () method needs to be implemented to return an integer. Otherwise, Python will throw a TypeError exception.

bin() Syntax

The syntax of the*bin()* method is

**bin(num)**

bin() Parameters

The bin() function takes a single argument, an integer whose binary representation will be returned.

If the given input is not an integer, then the __index__ () method needs to be implemented to return a valid integer.

bin() Return Value

The bin() method returns the binary equivalent string of the given integer.

Exceptions: ** Raises **TypeError when a float value is given as an input to the bin()function.

Example 1: Convert integer to binary using bin() method

# Python code to demonstrate the bin() function
number = 100
print('The binary equivalent of 100 is:', bin(number))

Output

The binary equivalent of 100 is: 0b1100100

Example 2: TypeError: ‘float’ object cannot be interpreted as an integer

# Python code to demonstrate the bin() function
number = 100.66
print('The binary equivalent of 100 is:', bin(number))

Output

raceback (most recent call last):
  File "c:\Projects\Tryouts\main.py", line 3, in <module>
    print('The binary equivalent of 100 is:', bin(number))
TypeError: 'float' object cannot be interpreted as an integer

Example 3: Convert an object to binary implementing __index__() method

In the below example, we are sending the *TotalPrice * class object to the bin() method.

The bin() method does not raise an exception even if the argument passed is not of integer type since we have implemented the __index__ () method in our class, which always returns the positive integer.

# Python code to demonstrate the bin() function using __index__ ()
class TotalPrice:
    apple = 100
    orange = 50
    watermelon=22

    def __index__ (self):
        return self.apple + self.orange + self.watermelon

print('The binary equivalent of Total Price object is:', bin(TotalPrice()))

Output

The binary equivalent of Total Price object is: 0b10101100

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