diff --git a/maths/binary_exponentiation.py b/maths/binary_exponentiation.py
index c5bb79897..7eeca8926 100644
--- a/maths/binary_exponentiation.py
+++ b/maths/binary_exponentiation.py
@@ -5,12 +5,12 @@
 
 
 def binary_exponentiation(a: int, n: int) -> int:
-    '''
+    """
     >>> binary_exponentiation(3, 5)
     243
     >>> binary_exponentiation(10, 3)
     1000
-    '''
+    """
     if n == 0:
         return 1
 
@@ -24,8 +24,9 @@ def binary_exponentiation(a: int, n: int) -> int:
 
 if __name__ == "__main__":
     import doctest
+
     doctest.testmod()
-    
+
     try:
         BASE = int(input("Enter Base : ").strip())
         POWER = int(input("Enter Power : ").strip())