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  1. def in_binary(n):
  2.     if n == 0:
  3.         return [] # base case
  4.     else:
  5.         digit = n & 0x1 # bit mask
  6.         return in_binary(n >> 1) + [digit] # recursion
  7.  
  8. def from_binary(b):
  9.     # add value of each digit, using enumerate to get its place
  10.     # list comprehensions are Pythonic
  11.     return sum([(2**place) * value
  12.                 for place, value in enumerate(b)])
  13.  
  14. two = in_binary(2)
  15. print from_binary(two + two)
Success #stdin #stdout 0.01s 7896KB
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stdin 
Standard input is empty
stdout 
5
https://ideone.com/xMJydU
language:
Python (cpython 2.7.16)
created:
10 years ago
visibility:
public

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