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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)
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