How to change from a decimal to a binary in python

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 Sep 11 '13 at 17:31 — thegrinner, Sep 11 '13 at 17:31

score 3 · Answer 1 · answered Sep 11 '13 at 17:31

3

How about bin:

>>> bin(42)
'0b101010'

answered Sep 11 '13 at 17:31

cnicutar

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This wont work. Try `bin(Decimal(10.9))` in python 2.x – karthikr Sep 11 '13 at 17:34
@karthikr Indeed, `bin` is only for integers, as stated in the documentation. However, I don't think the OP referred to `decimal.Decimal` – cnicutar Sep 11 '13 at 17:36
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there is no way to know that. :) – karthikr Sep 11 '13 at 17:36

score 1 · Answer 2 · answered Sep 11 '13 at 17:33

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 '13 at 17:33

inspectorG4dget

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Looks rather convoluted given that there are already standard functions to do just that. – arshajii Sep 11 '13 at 17:34
@arshajii: Yeah, but I figured I'd give a DIY answer for completeness, just in case that's what OP was after – inspectorG4dget Sep 11 '13 at 17:35

How to change from a decimal to a binary in python

2 Answers2