Create 0274-H-index.py

Author: 0xbrayo

Diff for: python/0274-H-index.py

@@ -0,0 +1,8 @@
+class Solution:
+    def hIndex(self, citations: List[int]) -> int:
+        length = len(citations)
+        citations.sort()
+        for i in range(length):
+            if citations[i] >= length - i:
+                return length - i
+        return 0