내장함수 - bin(x)

https://docs.python.org/2/library/functions.html?highlight=map#bin

bin(x)

상수를 2진수로 표현함. 정수는 지원하지 않음.

>>> bin(1)

'0b1'

>>> bin(10)

'0b1010'

>>> bin(-1)

'-0b1'

>>> bin(-10)

'-0b1010'

>>> bin(1.2)

Traceback (most recent call last):

  File "<stdin>", line 1, in <module>

TypeError: 'float' object cannot be interpreted as an index