http://code.activestate.com/recipes/tags/gray_code/new/2009-01-01T09:25:13-08:00ActiveState Code Recipes2009-01-01T09:25:13-08:00Shao-chuan Wanghttp://code.activestate.com/recipes/users/4168519/http://code.activestate.com/recipes/576592-gray-code-generatoriterator/

<p style="color: grey"> Python recipe 576592 by <a href="/recipes/users/4168519/">Shao-chuan Wang</a> (<a href="/recipes/tags/algorithm/">algorithm</a>, <a href="/recipes/tags/gray_code/">gray_code</a>). Revision 3. </p> <p>Please refer to: <a href="http://en.wikipedia.org/wiki/Gray_code" rel="nofollow">http://en.wikipedia.org/wiki/Gray_code</a></p> <p>The reflected binary code, also known as Gray code after Frank Gray, is a binary numeral system where two successive values differ in only one digit.</p> <p>The reflected binary code was originally designed to prevent spurious output from electromechanical switches. Today, Gray codes are widely used to facilitate error correction in digital communications such as digital terrestrial television and some cable TV systems.</p> <p>Example Gray Codes: 2-bit Gray code 00 01 11 10</p> <p>3-bit Gray code 000 001 011 010 110 111 101 100</p> <p>4-bit Gray code 0000 0001 0011 0010 0110 0111 0101 0100 1100 1101 1111 1110 1010 1011 1001 1000</p>