diff --git a/puzzles/day03.py b/puzzles/day03.py
index eb7c82f..d1598de 100644
--- a/puzzles/day03.py
+++ b/puzzles/day03.py
@@ -11,13 +11,13 @@ from typing import Dict, List, Tuple
 
 from collections import defaultdict
 
+
 class Diagnostics:
     report = None
 
     def __init__(self, report: List[int]) -> None:
         self.report = report
 
-
     def calc_power_usage(self) -> None:
         most_common = self.commonality(self.report)
         gamma = epsilon = ""
@@ -33,7 +33,6 @@ class Diagnostics:
         epsilon = int(epsilon, 2)
         return gamma * epsilon
 
-
     def calc_oxygen_generator_rating(self, inputs) -> int:
         """
         Bit Criteria:
@@ -45,18 +44,20 @@ class Diagnostics:
         for column in range(len(report[0])):
             most_common = self.commonality(report)
             for binary in list(report):
-                if (int(binary[column]) != most_common[column] and most_common[column] != 2) or (most_common[column] == 2 and binary[column] != "1"):
+                if (
+                    int(binary[column]) != most_common[column]
+                    and most_common[column] != 2
+                ) or (most_common[column] == 2 and binary[column] != "1"):
                     report.remove(binary)
 
                 if len(report) == 1:
                     return int(report[0], 2)
 
-        if len(report) > 1: # May not be necessary
+        if len(report) > 1:  # May not be necessary
             report = self.calc_oxygen_generator_rating(report)
 
         return int(report[0], 2)
 
-
     def calc_co2_scrubber_rating(self, inputs) -> int:
         """
         Bit Criteria:
@@ -68,24 +69,24 @@ class Diagnostics:
         for column in range(len(report[0])):
             most_common = self.commonality(report)
             for binary in list(report):
-                if (int(binary[column]) == most_common[column]) or (most_common[column] == 2 and binary[column] != "0"):
+                if (int(binary[column]) == most_common[column]) or (
+                    most_common[column] == 2 and binary[column] != "0"
+                ):
                     report.remove(binary)
 
                 if len(report) == 1:
                     return int(report[0], 2)
 
-        if len(report) > 1: # May not be necessary
+        if len(report) > 1:  # May not be necessary
             report = self.calc_oxygen_generator_rating(report)
 
         return int(report[0], 2)
 
-
     def calc_life_support_rating(self) -> int:
         oxygen_generator_rating = self.calc_oxygen_generator_rating(self.report)
         co2_scrubber_rating = self.calc_co2_scrubber_rating(self.report)
         return oxygen_generator_rating * co2_scrubber_rating
 
-
     @staticmethod
     def commonality(report: List[int]) -> List[Dict[str, int]]:
         num_1 = defaultdict(int)
@@ -94,10 +95,10 @@ class Diagnostics:
                 num_1[column] += int(bit)
 
         common = []
-        half_total = len(report)/2
+        half_total = len(report) / 2
         for count in num_1.values():
             if count == half_total:
-                common.append(2) # Indicating equally common
+                common.append(2)  # Indicating equally common
             elif count > half_total:
                 common.append(1)
             else: