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Python | bin method

Programming
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Python
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Built-in Functions
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Documentation
schedule Jul 1, 2022
Last updated
local_offer Python
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Python's bin(~) method converts an integer number to a binary string prefixed with “0b”. If the provided input is not an integer, it must implement a __index__() method to return an integer.

Parameters

1. x | integer

The integer number to convert to binary string.

Return value

The converted binary string of the integer prefixed with "0b".

Examples

Basic usage

To return the binary string for 6:

bin(6)
'0b110'

Note that "0b" just indicates that it is a binary string.

__index__() method

To use bin(~) method with input that implements __index__() method:

class score:
james = 2
sally = 4
tom = 3
def __index__(self):
return self.james + self.sally + self.tom
bin(score())
'0b1001'

We provide an instance of score class as input to the bin(~) method. Although the instance itself is not an integer, as it returns an integer (sum of james + sally + tom) which in this case is 9, bin(~) returns the binary string for 9.

TypeError

If we provide input other than an integer:

bin('Hi')
TypeError: 'str' object cannot be interpreted as an integer
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Published by Arthur Yanagisawa
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