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authorVincent Ambo <mail@tazj.in>2021-12-13T22·51+0300
committerVincent Ambo <mail@tazj.in>2021-12-13T23·15+0300
commit019f8fd2113df4c5247c3969c60fd4f0e08f91f7 (patch)
tree76a857f61aa88f62a30e854651e8439db77fd0ea /users/wpcarro/scratch/data_structures_and_algorithms/temperature-tracker.py
parent464bbcb15c09813172c79820bcf526bb10cf4208 (diff)
parent6123e976928ca3d8d93f0b2006b10b5f659eb74d (diff)
subtree(users/wpcarro): docking briefcase at '24f5a642' r/3226
git-subtree-dir: users/wpcarro
git-subtree-mainline: 464bbcb15c09813172c79820bcf526bb10cf4208
git-subtree-split: 24f5a642af3aa1627bbff977f0a101907a02c69f
Change-Id: I6105b3762b79126b3488359c95978cadb3efa789
Diffstat (limited to 'users/wpcarro/scratch/data_structures_and_algorithms/temperature-tracker.py')
-rw-r--r--users/wpcarro/scratch/data_structures_and_algorithms/temperature-tracker.py84
1 files changed, 84 insertions, 0 deletions
diff --git a/users/wpcarro/scratch/data_structures_and_algorithms/temperature-tracker.py b/users/wpcarro/scratch/data_structures_and_algorithms/temperature-tracker.py
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+++ b/users/wpcarro/scratch/data_structures_and_algorithms/temperature-tracker.py
@@ -0,0 +1,84 @@
+import unittest
+
+
+################################################################################
+# Solution
+################################################################################
+class TempTracker(object):
+    def __init__(self):
+        # min / max
+        self.min = None
+        self.max = None
+        # mean
+        self.sum = 0
+        self.num = 0
+        # mode
+        self.nums = [0] * 111
+        self.mode_num = 0
+        self.mode = None
+
+    def insert(self, x):
+        # min / max
+        if not self.min or x < self.min:
+            self.min = x
+        if not self.max or x > self.max:
+            self.max = x
+        # mean
+        self.sum += x
+        self.num += 1
+        # mode
+        self.nums[x] += 1
+        if self.nums[x] >= self.mode_num:
+            self.mode_num = self.nums[x]
+            self.mode = x
+
+    def get_max(self):
+        return self.max
+
+    def get_min(self):
+        return self.min
+
+    def get_mean(self):
+        return self.sum / self.num
+
+    def get_mode(self):
+        return self.mode
+
+
+# Tests
+
+
+class Test(unittest.TestCase):
+    def test_tracker_usage(self):
+        tracker = TempTracker()
+
+        tracker.insert(50)
+        msg = 'failed on first temp recorded'
+        self.assertEqual(tracker.get_max(), 50, msg='max ' + msg)
+        self.assertEqual(tracker.get_min(), 50, msg='min ' + msg)
+        self.assertEqual(tracker.get_mean(), 50.0, msg='mean ' + msg)
+        self.assertEqual(tracker.get_mode(), 50, msg='mode ' + msg)
+
+        tracker.insert(80)
+        msg = 'failed on higher temp recorded'
+        self.assertEqual(tracker.get_max(), 80, msg='max ' + msg)
+        self.assertEqual(tracker.get_min(), 50, msg='min ' + msg)
+        self.assertEqual(tracker.get_mean(), 65.0, msg='mean ' + msg)
+        self.assertIn(tracker.get_mode(), [50, 80], msg='mode ' + msg)
+
+        tracker.insert(80)
+        msg = 'failed on third temp recorded'
+        self.assertEqual(tracker.get_max(), 80, msg='max ' + msg)
+        self.assertEqual(tracker.get_min(), 50, msg='min ' + msg)
+        self.assertEqual(tracker.get_mean(), 70.0, msg='mean ' + msg)
+        self.assertEqual(tracker.get_mode(), 80, msg='mode ' + msg)
+
+        tracker.insert(30)
+        msg = 'failed on lower temp recorded'
+        self.assertEqual(tracker.get_max(), 80, msg='max ' + msg)
+        self.assertEqual(tracker.get_min(), 30, msg='min ' + msg)
+        self.assertEqual(tracker.get_mean(), 60.0, msg='mean ' + msg)
+        self.assertEqual(tracker.get_mode(), 80, msg='mode ' + msg)
+
+
+unittest.main(verbosity=2)