Python's built-in function bin ()

Bin (x)

英文说明: Converts an integer x to a binary string, and if x is not of type int in Python, x must contain the method __index__ () and the return value is integer;

parameter x: An integer or a type containing the __index__ () method that returns a value of integer;

version : The bin function is a new function in python2.6, and you should pay attention to the version problem when using.

Example:

The case of integers:

Here the results of the form and our usual habits some differences, mainly in front of more than 0b, which is the meaning of binary.

>>> Bin (5) ' 0b101 ' >>> len (Bin (5)) 5

Non-integer case: Must contain the __index__ () method to cut the type of the return value to Integer

>>> class Mytype:def __index__ (self): return    >>> myvar = MyType () >>> bin (myvar) 
  
    ' 0b1000001001 '
  

　　

Python's built-in function bin ()