Remove some print statements within algorithmic functions (#7499)

* Remove commented-out print statements in algorithmic functions

* Encapsulate non-algorithmic code in __main__

* Remove unused print_matrix function

* Remove print statement in __init__

* Remove print statement from doctest

* Encapsulate non-algorithmic code in __main__

* Modify algorithm to return instead of print

* Encapsulate non-algorithmic code in __main__

* Refactor data_safety_checker to return instead of print

* updating DIRECTORY.md

* updating DIRECTORY.md

* Apply suggestions from code review

* [pre-commit.ci] auto fixes from pre-commit.com hooks

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Co-authored-by: github-actions <${GITHUB_ACTOR}@users.noreply.github.com>
Co-authored-by: Christian Clauss <cclauss@me.com>
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

dynamic_programming/longest_sub_array.py

@@ -14,7 +14,6 @@ class SubArray:
     def __init__(self, arr):
         # we need a list not a string, so do something to change the type
         self.array = arr.split(",")
-        print(("the input array is:", self.array))
 
     def solve_sub_array(self):
         rear = [int(self.array[0])] * len(self.array)

dynamic_programming/max_non_adjacent_sum.py

@@ -7,7 +7,7 @@ def maximum_non_adjacent_sum(nums: list[int]) -> int:
     """
     Find the maximum non-adjacent sum of the integers in the nums input list
 
-    >>> print(maximum_non_adjacent_sum([1, 2, 3]))
+    >>> maximum_non_adjacent_sum([1, 2, 3])
     4
     >>> maximum_non_adjacent_sum([1, 5, 3, 7, 2, 2, 6])
     18

dynamic_programming/subset_generation.py

@@ -37,7 +37,8 @@ def print_combination(arr, n, r):
     combination_util(arr, n, r, 0, data, 0)
 
 
-# Driver function to check for above function
-arr = [10, 20, 30, 40, 50]
-print_combination(arr, len(arr), 3)
-# This code is contributed by Ambuj sahu
+if __name__ == "__main__":
+    # Driver code to check the function above
+    arr = [10, 20, 30, 40, 50]
+    print_combination(arr, len(arr), 3)
+    # This code is contributed by Ambuj sahu

dynamic_programming/sum_of_subset.py

@@ -1,13 +1,14 @@
-def is_sum_subset(arr, arr_len, required_sum):
+def is_sum_subset(arr: list[int], required_sum: int) -> bool:
     """
-    >>> is_sum_subset([2, 4, 6, 8], 4, 5)
+    >>> is_sum_subset([2, 4, 6, 8], 5)
     False
-    >>> is_sum_subset([2, 4, 6, 8], 4, 14)
+    >>> is_sum_subset([2, 4, 6, 8], 14)
     True
     """
     # a subset value says 1 if that subset sum can be formed else 0
     # initially no subsets can be formed hence False/0
-    subset = [[False for i in range(required_sum + 1)] for i in range(arr_len + 1)]
+    arr_len = len(arr)
+    subset = [[False] * (required_sum + 1) for _ in range(arr_len + 1)]
 
     # for each arr value, a sum of zero(0) can be formed by not taking any element
     # hence True/1
@@ -25,10 +26,7 @@ def is_sum_subset(arr, arr_len, required_sum):
             if arr[i - 1] <= j:
                 subset[i][j] = subset[i - 1][j] or subset[i - 1][j - arr[i - 1]]
 
-    # uncomment to print the subset
-    # for i in range(arrLen+1):
-    #     print(subset[i])
-    print(subset[arr_len][required_sum])
+    return subset[arr_len][required_sum]
 
 
 if __name__ == "__main__":