project_euler/problem_047/sol1.py: def solution(n: int = 4) -> int | None:

Author: cclauss

project_euler/problem_047/sol1.py

@@ -24,7 +24,7 @@
 def unique_prime_factors(n: int) -> set:
     """
     Find unique prime factors of an integer.
-    Tests include sorting because only the set really matters,
+    Tests include sorting because only the set matters,
     not the order in which it is produced.
     >>> sorted(set(unique_prime_factors(14)))
     [2, 7]
@@ -58,7 +58,7 @@ def upf_len(num: int) -> int:
 
 def equality(iterable: list) -> bool:
     """
-    Check equality of ALL elements in an iterable
+    Check the equality of ALL elements in an iterable
     >>> equality([1, 2, 3, 4])
     False
     >>> equality([2, 2, 2, 2])
@@ -69,23 +69,23 @@ def equality(iterable: list) -> bool:
     return len(set(iterable)) in (0, 1)
 
 
-def run(n: int) -> list:
+def run(n: int) -> list:[int]
     """
     Runs core process to find problem solution.
     >>> run(3)
     [644, 645, 646]
     """
 
     # Incrementor variable for our group list comprehension.
-    # This serves as the first number in each list of values
+    # This is the first number in each list of values
     # to test.
     base = 2
 
     while True:
         # Increment each value of a generated range
         group = [base + i for i in range(n)]
 
-        # Run elements through out unique_prime_factors function
+        # Run elements through the unique_prime_factors function
         # Append our target number to the end.
         checker = [upf_len(x) for x in group]
         checker.append(n)
@@ -98,7 +98,7 @@ def run(n: int) -> list:
         base += 1
 
 
-def solution(n: int = 4) -> int:
+def solution(n: int = 4) -> int | None:
     """Return the first value of the first four consecutive integers to have four
     distinct prime factors each.
     >>> solution()