How to change from a decimal to a binary in python [duplicate]

Question

So yeah I'm trying to figure a way on how to change a decimal into a binary in python

So you want to print an integer in binary?

thegrinner
– thegrinner

2013-09-11 17:31:05 +00:00
Commented Sep 11, 2013 at 17:31 — thegrinner
– thegrinner, Commented Sep 11, 2013 at 17:31

cnicutar · Accepted Answer · 2013-09-11 17:31:45Z

3

How about bin:

>>> bin(42)
'0b101010'

answered Sep 11, 2013 at 17:31

cnicutar

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3 Comments

karthikr Over a year ago

This wont work. Try bin(Decimal(10.9)) in python 2.x

cnicutar Over a year ago

@karthikr Indeed, bin is only for integers, as stated in the documentation. However, I don't think the OP referred to decimal.Decimal

karthikr Over a year ago

there is no way to know that. :)

inspectorG4dget · Accepted Answer · 2013-09-11 17:33:48Z

1

In [1]: def dec2bin(n):
   ...:     if not n:
   ...:         return ''
   ...:     else:
   ...:         return dec2bin(n/2) + str(n%2)
   ...:     

In [2]: dec2bin(11)
Out[2]: '1011'

answered Sep 11, 2013 at 17:33

inspectorG4dget

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2 Comments

arshajii Over a year ago

Looks rather convoluted given that there are already standard functions to do just that.

inspectorG4dget Over a year ago

@arshajii: Yeah, but I figured I'd give a DIY answer for completeness, just in case that's what OP was after

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