Added insertion sort

.gitignore

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+*.pyc
+algo_venv/

algorithms/sorting/bubble_sort.py

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+""" Implementation of Bubble Sort. """
+
+def sort(seq):
+
+    for x in seq:
+        temp = 0
+        for n in range(1, len(seq)):
+            temp = seq[n]
+            if seq[n] < seq[n-1]:
+                seq[n] = seq[n-1]
+                seq[n-1] = temp
+    return seq    

algorithms/sorting/insertion_sort.py

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+""" Implementation of Insertion Sort """
+
+def sort(seq):
+    for n in range(1, len(seq)):
+        item = seq[n]
+        hole = n
+        while hole > 0 and seq[ hole - 1] > item:
+            seq[hole] = seq[hole - 1]
+            hole = hole - 1
+        seq[hole] = item
+    return seq

algorithms/sorting/selection_sort.py

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+""" Implementation of Selection Sort. """
+
+def sort(seq):
+
+    for i in range(0, len(seq)):
+        minat = i
+        minum = seq[i]
+        for j in range(i+1, len(seq)):
+            if minum > seq[j]:
+                minat = j
+                minum = seq[j]
+        temp = seq[i]
+        seq[i] = seq[minat]
+        seq[minat] = temp
+
+    return seq

algorithms/tests/test_sorting.py

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+import random
+import unittest
+from ..sorting import bubble_sort, selection_sort, insertion_sort
+
+class TestBubbleSort(unittest.TestCase):
+    """
+    Tests Bubble sort on a small range from 0-9
+    """
+    def test_bubblesort(self):
+        self.seq = range(10)
+        random.shuffle(self.seq)
+        rv = bubble_sort.sort(self.seq)
+        self.assertIs(self.seq[0], 0)
+        self.assertIs(self.seq[-1], 9)
+
+class TestSelectionSort(unittest.TestCase):
+    """
+    Tests Selection sort on a small range from 0-9
+    """
+    def test_selectionsort(self):
+        self.seq = range(10)
+        random.shuffle(self.seq)
+        rv = selection_sort.sort(self.seq)
+        self.assertIs(self.seq[0], 0)
+        self.assertIs(self.seq[-1], 9)
+
+class TestInsertionSort(unittest.TestCase):
+    """
+    Tests Insertion sort on a small range from 0-9
+    """
+    def test_selectionsort(self):
+        self.seq = range(10)
+        random.shuffle(self.seq)
+        rv = insertion_sort.sort(self.seq)
+        self.assertIs(self.seq[0], 0)
+        self.assertIs(self.seq[-1], 9)

run_tests.py

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+import nose
+
+if __name__ == '__main__':
+    nose.main()