feat(day 55): implement stellar classification logic with full unittest coverage in the SpaceWeek folder

Author: JohnSunny21

FreeCodeCamp/CodingQ/SpaceWeek/SpaceWeak.py

@@ -0,0 +1,99 @@
+"""
+Space Week Day 1: Stellar Classification
+October 4th marks the beginning of World Space Week. The next seven days will bring you astronomy-themed coding challenges.
+
+For today's challenge, you are given the surface temperature of a star in Kelvin (K) and need to determine its stellar classification based on the following ranges:
+
+"O": 30,000 K or higher
+
+"B": 10,000 K - 29,999 K
+
+"A": 7,500 K - 9,999 K
+
+"F": 6,000 K - 7,499 K
+
+"G": 5,200 K - 5,999 K
+
+"K": 3,700 K - 5,199 K
+
+"M": 0 K - 3,699 K
+
+Return the classification of the given star.
+"""
+import unittest
+class Test(unittest.TestCase):
+
+    def test1(self):
+        self.assertEqual(classification(5778),"G")
+
+    def test2(self):
+        self.assertEqual(classification(2400),"M")
+    
+    def test3(self):
+        self.assertEqual(classification(9999),"A")
+    
+    def test4(self):
+        self.assertEqual(classification(3700),"K")
+
+    def test5(self):
+        self.assertEqual(classification(3699),"M")
+
+    def test6(self):
+        self.assertEqual(classification(210000),"O")
+
+    def test7(self):
+        self.assertEqual(classification(6000),"F")
+
+    def test8(self):
+        self.assertEqual(classification(11432),"B")
+
+
+
+
+
+
+
+
+
+def classification(temp):
+
+    if temp <= 3699:
+        temp = 'M'
+    elif 3700 <= temp <= 5199:
+        temp = 'K'
+    elif 5200 <= temp <= 5999:
+        temp = 'G'
+    elif 6000 <= temp <= 7499:
+        temp = 'F'
+    elif 7500 <= temp <= 9999:
+        temp ='A'
+    elif 10000 <= temp <= 29999:
+        temp = 'B'
+    else:
+        temp = 'O'
+
+    return temp
+
+# Alternate method
+def classify_star(temp):
+
+    if temp >= 30000:
+        return 'O'
+    elif temp >= 10000:
+        return 'B'
+    elif temp >= 7500:
+        return 'A'
+    elif temp >= 6000:
+        return 'F'
+    elif temp >= 5200:
+        return 'G'
+    elif temp >= 3700:
+        return 'K'
+    elif temp >= 0:
+        return 'M'
+    else:
+        raise ValueError("Temperature must be a non-negative numder.")
+
+if __name__ == "__main__":
+    print(classification(5778))
+    unittest.main()