Update 619. Biggest Single Number.py

Author: iamAntimPal

LeetCode SQL 50 Solution/619. Biggest Single Number/619. Biggest Single Number.py

@@ -0,0 +1,13 @@
+import pandas as pd
+
+def biggest_single_number(my_numbers: pd.DataFrame) -> pd.DataFrame:
+    # Group by 'num' and filter those numbers that appear exactly once
+    unique_numbers = my_numbers.groupby('num').filter(lambda group: len(group) == 1)
+    
+    # Determine the largest single number, if any
+    if unique_numbers.empty:
+        result = None
+    else:
+        result = unique_numbers['num'].max()
+    
+    return pd.DataFrame({'num': [result]})