reorganize dir

Signed-off-by: Mia Steinkirch <mia.steinkirch@gmail.com>

ebook_src/bitwise/swap_in_place.py

@@ -0,0 +1,23 @@
+#!/usr/bin/env python
+
+__author__ = "bt3"
+
+'''
+    swapping values in place without extra memory
+'''
+
+
+def swap_bit(a, b):
+    '''
+    >>> swap_bit(14, 73)
+    (73, 14)
+    '''
+    a = a^b
+    b = a^b
+    a = a^b
+    return a, b
+
+
+if __name__ == '__main__':
+    import doctest
+    doctest.testmod()