1 files changed, 32 insertions, 0 deletions
diff --git a/challenge-235/steven-wilson/python/ch-2.py b/challenge-235/steven-wilson/python/ch-2.py
new file mode 100644
index 0000000000..9a5586206e
--- /dev/null
+++ b/challenge-235/steven-wilson/python/ch-2.py
@@ -0,0 +1,32 @@
+#!/usr/bin/env python3
+
+
+def duplicate_zero(elements):
+    '''duplicate each occurrence of ZERO in the given array and shift 
+    the remaining to the right but make sure the size of array remain 
+    the same
+    >>> duplicate_zero( [1, 0, 2, 3, 0, 4, 5, 0] )
+    [1, 0, 0, 2, 3, 0, 0, 4]
+    >>> duplicate_zero( [1, 2, 3] )
+    [1, 2, 3]
+    >>> duplicate_zero( [0, 3, 0, 4, 5] )
+    [0, 0, 3, 0, 0]
+    >>> duplicate_zero( [1, 2, 3, 0] )
+    [1, 2, 3, 0]
+    '''
+    duplicate_zeroes = []
+    elements_length = len(elements)
+    for i in range(elements_length):
+        if(elements[i] == 0):
+            duplicate_zeroes.extend([0,0])
+        else:
+            duplicate_zeroes.append(elements[i])
+        if len(duplicate_zeroes) >= elements_length:
+            break
+    return duplicate_zeroes[:elements_length]
+
+
+if __name__ == "__main__":
+    import doctest
+
+    doctest.testmod()