Add flake8-builtins to pre-commit and fix errors (#7105)

Ignore `A003`

Co-authored-by: Christian Clauss <cclauss@me.com>
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Dhruv Manilawala <dhruvmanila@gmail.com>

.flake8

@@ -0,0 +1,3 @@
+[flake8]
+extend-ignore =
+    A003  # Class attribute is shadowing a python builtin

.pre-commit-config.yaml

@@ -40,7 +40,7 @@ repos:
           - --ignore=E203,W503
           - --max-complexity=25
           - --max-line-length=88
-        additional_dependencies: [pep8-naming]
+        additional_dependencies: [flake8-builtins, pep8-naming]
 
   - repo: https://github.com/pre-commit/mirrors-mypy
     rev: v0.982

arithmetic_analysis/gaussian_elimination.py

@@ -33,11 +33,11 @@ def retroactive_resolution(
 
     x: NDArray[float64] = np.zeros((rows, 1), dtype=float)
     for row in reversed(range(rows)):
-        sum = 0
+        total = 0
         for col in range(row + 1, columns):
-            sum += coefficients[row, col] * x[col]
+            total += coefficients[row, col] * x[col]
 
-        x[row, 0] = (vector[row] - sum) / coefficients[row, row]
+        x[row, 0] = (vector[row] - total) / coefficients[row, row]
 
     return x
 

arithmetic_analysis/jacobi_iteration_method.py

@@ -147,14 +147,14 @@ def strictly_diagonally_dominant(table: NDArray[float64]) -> bool:
     is_diagonally_dominant = True
 
     for i in range(0, rows):
-        sum = 0
+        total = 0
         for j in range(0, cols - 1):
             if i == j:
                 continue
             else:
-                sum += table[i][j]
+                total += table[i][j]
 
-        if table[i][i] <= sum:
+        if table[i][i] <= total:
             raise ValueError("Coefficient matrix is not strictly diagonally dominant")
 
     return is_diagonally_dominant

audio_filters/show_response.py

@@ -34,7 +34,7 @@ def get_bounds(
     return lowest, highest
 
 
-def show_frequency_response(filter: FilterType, samplerate: int) -> None:
+def show_frequency_response(filter_type: FilterType, samplerate: int) -> None:
     """
     Show frequency response of a filter
 
@@ -45,7 +45,7 @@ def show_frequency_response(filter: FilterType, samplerate: int) -> None:
 
     size = 512
     inputs = [1] + [0] * (size - 1)
-    outputs = [filter.process(item) for item in inputs]
+    outputs = [filter_type.process(item) for item in inputs]
 
     filler = [0] * (samplerate - size)  # zero-padding
     outputs += filler
@@ -66,7 +66,7 @@ def show_frequency_response(filter: FilterType, samplerate: int) -> None:
     plt.show()
 
 
-def show_phase_response(filter: FilterType, samplerate: int) -> None:
+def show_phase_response(filter_type: FilterType, samplerate: int) -> None:
     """
     Show phase response of a filter
 
@@ -77,7 +77,7 @@ def show_phase_response(filter: FilterType, samplerate: int) -> None:
 
     size = 512
     inputs = [1] + [0] * (size - 1)
-    outputs = [filter.process(item) for item in inputs]
+    outputs = [filter_type.process(item) for item in inputs]
 
     filler = [0] * (samplerate - size)  # zero-padding
     outputs += filler

backtracking/hamiltonian_cycle.py

@@ -95,10 +95,10 @@ def util_hamilton_cycle(graph: list[list[int]], path: list[int], curr_ind: int)
         return graph[path[curr_ind - 1]][path[0]] == 1
 
     # Recursive Step
-    for next in range(0, len(graph)):
+    for next_ver in range(0, len(graph)):
-        if valid_connection(graph, next, curr_ind, path):
+        if valid_connection(graph, next_ver, curr_ind, path):
             # Insert current vertex  into path as next transition
-            path[curr_ind] = next
+            path[curr_ind] = next_ver
             # Validate created path
             if util_hamilton_cycle(graph, path, curr_ind + 1):
                 return True

data_structures/binary_tree/avl_tree.py

@@ -33,7 +33,7 @@ class MyQueue:
     def count(self) -> int:
         return self.tail - self.head
 
-    def print(self) -> None:
+    def print_queue(self) -> None:
         print(self.data)
         print("**************")
         print(self.data[self.head : self.tail])

data_structures/linked_list/__init__.py

@@ -11,7 +11,7 @@ from typing import Any
 
 
 class Node:
-    def __init__(self, item: Any, next: Any) -> None:
+    def __init__(self, item: Any, next: Any) -> None:  # noqa: A002
         self.item = item
         self.next = next
 

data_structures/linked_list/singly_linked_list.py

@@ -392,7 +392,7 @@ def test_singly_linked_list_2() -> None:
     This section of the test used varying data types for input.
     >>> test_singly_linked_list_2()
     """
-    input = [
+    test_input = [
         -9,
         100,
         Node(77345112),
@@ -410,7 +410,7 @@ def test_singly_linked_list_2() -> None:
     ]
     linked_list = LinkedList()
 
-    for i in input:
+    for i in test_input:
         linked_list.insert_tail(i)
 
     # Check if it's empty or not

data_structures/queue/double_ended_queue.py

@@ -15,8 +15,8 @@ class Deque:
     ----------
     append(val: Any) -> None
     appendleft(val: Any) -> None
-    extend(iter: Iterable) -> None
+    extend(iterable: Iterable) -> None
-    extendleft(iter: Iterable) -> None
+    extendleft(iterable: Iterable) -> None
     pop() -> Any
     popleft() -> Any
     Observers
@@ -179,9 +179,9 @@ class Deque:
             # make sure there were no errors
             assert not self.is_empty(), "Error on appending value."
 
-    def extend(self, iter: Iterable[Any]) -> None:
+    def extend(self, iterable: Iterable[Any]) -> None:
         """
-        Appends every value of iter to the end of the deque.
+        Appends every value of iterable to the end of the deque.
         Time complexity: O(n)
         >>> our_deque_1 = Deque([1, 2, 3])
         >>> our_deque_1.extend([4, 5])
@@ -205,12 +205,12 @@ class Deque:
         >>> list(our_deque_2) == list(deque_collections_2)
         True
         """
-        for val in iter:
+        for val in iterable:
             self.append(val)
 
-    def extendleft(self, iter: Iterable[Any]) -> None:
+    def extendleft(self, iterable: Iterable[Any]) -> None:
         """
-        Appends every value of iter to the beginning of the deque.
+        Appends every value of iterable to the beginning of the deque.
         Time complexity: O(n)
         >>> our_deque_1 = Deque([1, 2, 3])
         >>> our_deque_1.extendleft([0, -1])
@@ -234,7 +234,7 @@ class Deque:
         >>> list(our_deque_2) == list(deque_collections_2)
         True
         """
-        for val in iter:
+        for val in iterable:
             self.appendleft(val)
 
     def pop(self) -> Any:

data_structures/stacks/next_greater_element.py

@@ -17,12 +17,12 @@ def next_greatest_element_slow(arr: list[float]) -> list[float]:
     arr_size = len(arr)
 
     for i in range(arr_size):
-        next: float = -1
+        next_element: float = -1
         for j in range(i + 1, arr_size):
             if arr[i] < arr[j]:
-                next = arr[j]
+                next_element = arr[j]
                 break
-        result.append(next)
+        result.append(next_element)
     return result
 
 
@@ -36,12 +36,12 @@ def next_greatest_element_fast(arr: list[float]) -> list[float]:
     """
     result = []
     for i, outer in enumerate(arr):
-        next: float = -1
+        next_item: float = -1
         for inner in arr[i + 1 :]:
             if outer < inner:
-                next = inner
+                next_item = inner
                 break
-        result.append(next)
+        result.append(next_item)
     return result
 
 

digital_image_processing/index_calculation.py

@@ -497,9 +497,9 @@ class IndexCalculation:
         https://www.indexdatabase.de/db/i-single.php?id=77
         :return: index
         """
-        max = np.max([np.max(self.red), np.max(self.green), np.max(self.blue)])
+        max_value = np.max([np.max(self.red), np.max(self.green), np.max(self.blue)])
-        min = np.min([np.min(self.red), np.min(self.green), np.min(self.blue)])
+        min_value = np.min([np.min(self.red), np.min(self.green), np.min(self.blue)])
-        return (max - min) / max
+        return (max_value - min_value) / max_value
 
     def _if(self):
         """

dynamic_programming/optimal_binary_search_tree.py

@@ -104,7 +104,7 @@ def find_optimal_binary_search_tree(nodes):
     dp = [[freqs[i] if i == j else 0 for j in range(n)] for i in range(n)]
     # sum[i][j] stores the sum of key frequencies between i and j inclusive in nodes
     # array
-    sum = [[freqs[i] if i == j else 0 for j in range(n)] for i in range(n)]
+    total = [[freqs[i] if i == j else 0 for j in range(n)] for i in range(n)]
     # stores tree roots that will be used later for constructing binary search tree
     root = [[i if i == j else 0 for j in range(n)] for i in range(n)]
 
@@ -113,14 +113,14 @@ def find_optimal_binary_search_tree(nodes):
             j = i + interval_length - 1
 
             dp[i][j] = sys.maxsize  # set the value to "infinity"
-            sum[i][j] = sum[i][j - 1] + freqs[j]
+            total[i][j] = total[i][j - 1] + freqs[j]
 
             # Apply Knuth's optimization
             # Loop without optimization: for r in range(i, j + 1):
             for r in range(root[i][j - 1], root[i + 1][j] + 1):  # r is a temporal root
                 left = dp[i][r - 1] if r != i else 0  # optimal cost for left subtree
                 right = dp[r + 1][j] if r != j else 0  # optimal cost for right subtree
-                cost = left + sum[i][j] + right
+                cost = left + total[i][j] + right
 
                 if dp[i][j] > cost:
                     dp[i][j] = cost

graphs/a_star.py

@@ -40,10 +40,10 @@ def search(
         else:  # to choose the least costliest action so as to move closer to the goal
             cell.sort()
             cell.reverse()
-            next = cell.pop()
+            next_cell = cell.pop()
-            x = next[2]
+            x = next_cell[2]
-            y = next[3]
+            y = next_cell[3]
-            g = next[1]
+            g = next_cell[1]
 
             if x == goal[0] and y == goal[1]:
                 found = True

graphs/dijkstra.py

@@ -56,8 +56,8 @@ def dijkstra(graph, start, end):
         for v, c in graph[u]:
             if v in visited:
                 continue
-            next = cost + c
+            next_item = cost + c
-            heapq.heappush(heap, (next, v))
+            heapq.heappush(heap, (next_item, v))
     return -1
 
 

graphs/finding_bridges.py

@@ -72,22 +72,22 @@ def compute_bridges(graph: dict[int, list[int]]) -> list[tuple[int, int]]:
     []
     """
 
-    id = 0
+    id_ = 0
     n = len(graph)  # No of vertices in graph
     low = [0] * n
     visited = [False] * n
 
-    def dfs(at, parent, bridges, id):
+    def dfs(at, parent, bridges, id_):
         visited[at] = True
-        low[at] = id
+        low[at] = id_
-        id += 1
+        id_ += 1
         for to in graph[at]:
             if to == parent:
                 pass
             elif not visited[to]:
-                dfs(to, at, bridges, id)
+                dfs(to, at, bridges, id_)
                 low[at] = min(low[at], low[to])
-                if id <= low[to]:
+                if id_ <= low[to]:
                     bridges.append((at, to) if at < to else (to, at))
             else:
                 # This edge is a back edge and cannot be a bridge
@@ -96,7 +96,7 @@ def compute_bridges(graph: dict[int, list[int]]) -> list[tuple[int, int]]:
     bridges: list[tuple[int, int]] = []
     for i in range(n):
         if not visited[i]:
-            dfs(i, -1, bridges, id)
+            dfs(i, -1, bridges, id_)
     return bridges
 
 

graphs/prim.py

@@ -13,7 +13,7 @@ from collections.abc import Iterator
 class Vertex:
     """Class Vertex."""
 
-    def __init__(self, id):
+    def __init__(self, id_):
         """
         Arguments:
             id - input an id to identify the vertex
@@ -21,7 +21,7 @@ class Vertex:
             neighbors - a list of the vertices it is linked to
             edges     - a dict to store the edges's weight
         """
-        self.id = str(id)
+        self.id = str(id_)
         self.key = None
         self.pi = None
         self.neighbors = []

hashes/djb2.py

@@ -29,7 +29,7 @@ def djb2(s: str) -> int:
     >>> djb2('scramble bits')
     1609059040
     """
-    hash = 5381
+    hash_value = 5381
     for x in s:
-        hash = ((hash << 5) + hash) + ord(x)
+        hash_value = ((hash_value << 5) + hash_value) + ord(x)
-    return hash & 0xFFFFFFFF
+    return hash_value & 0xFFFFFFFF

hashes/sdbm.py

@@ -31,7 +31,9 @@ def sdbm(plain_text: str) -> int:
     >>> sdbm('scramble bits')
     730247649148944819640658295400555317318720608290373040936089
     """
-    hash = 0
+    hash_value = 0
     for plain_chr in plain_text:
-        hash = ord(plain_chr) + (hash << 6) + (hash << 16) - hash
+        hash_value = (
-    return hash
+            ord(plain_chr) + (hash_value << 6) + (hash_value << 16) - hash_value
+        )
+    return hash_value

maths/armstrong_numbers.py

@@ -25,7 +25,7 @@ def armstrong_number(n: int) -> bool:
         return False
 
     # Initialization of sum and number of digits.
-    sum = 0
+    total = 0
     number_of_digits = 0
     temp = n
     # Calculation of digits of the number
@@ -36,9 +36,9 @@ def armstrong_number(n: int) -> bool:
     temp = n
     while temp > 0:
         rem = temp % 10
-        sum += rem**number_of_digits
+        total += rem**number_of_digits
         temp //= 10
-    return n == sum
+    return n == total
 
 
 def pluperfect_number(n: int) -> bool:
@@ -55,7 +55,7 @@ def pluperfect_number(n: int) -> bool:
     # Init a "histogram" of the digits
     digit_histogram = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
     digit_total = 0
-    sum = 0
+    total = 0
     temp = n
     while temp > 0:
         temp, rem = divmod(temp, 10)
@@ -63,9 +63,9 @@ def pluperfect_number(n: int) -> bool:
         digit_total += 1
 
     for (cnt, i) in zip(digit_histogram, range(len(digit_histogram))):
-        sum += cnt * i**digit_total
+        total += cnt * i**digit_total
 
-    return n == sum
+    return n == total
 
 
 def narcissistic_number(n: int) -> bool:

maths/bailey_borwein_plouffe.py

@@ -67,7 +67,7 @@ def _subsum(
     @param precision: same as precision in main function
     @return: floating-point number whose integer part is not important
     """
-    sum = 0.0
+    total = 0.0
     for sum_index in range(digit_pos_to_extract + precision):
         denominator = 8 * sum_index + denominator_addend
         if sum_index < digit_pos_to_extract:
@@ -79,8 +79,8 @@ def _subsum(
             )
         else:
             exponential_term = pow(16, digit_pos_to_extract - 1 - sum_index)
-        sum += exponential_term / denominator
+        total += exponential_term / denominator
-    return sum
+    return total
 
 
 if __name__ == "__main__":

maths/kadanes.py

@@ -14,13 +14,13 @@ def negative_exist(arr: list) -> int:
     [-2, 0, 0, 0, 0]
     """
     arr = arr or [0]
-    max = arr[0]
+    max_number = arr[0]
     for i in arr:
         if i >= 0:
             return 0
-        elif max <= i:
+        elif max_number <= i:
-            max = i
+            max_number = i
-    return max
+    return max_number
 
 
 def kadanes(arr: list) -> int:

maths/prime_numbers.py

@@ -2,7 +2,7 @@ import math
 from collections.abc import Generator
 
 
-def slow_primes(max: int) -> Generator[int, None, None]:
+def slow_primes(max_n: int) -> Generator[int, None, None]:
     """
     Return a list of all primes numbers up to max.
     >>> list(slow_primes(0))
@@ -20,7 +20,7 @@ def slow_primes(max: int) -> Generator[int, None, None]:
     >>> list(slow_primes(10000))[-1]
     9973
     """
-    numbers: Generator = (i for i in range(1, (max + 1)))
+    numbers: Generator = (i for i in range(1, (max_n + 1)))
     for i in (n for n in numbers if n > 1):
         for j in range(2, i):
             if (i % j) == 0:
@@ -29,7 +29,7 @@ def slow_primes(max: int) -> Generator[int, None, None]:
             yield i
 
 
-def primes(max: int) -> Generator[int, None, None]:
+def primes(max_n: int) -> Generator[int, None, None]:
     """
     Return a list of all primes numbers up to max.
     >>> list(primes(0))
@@ -47,7 +47,7 @@ def primes(max: int) -> Generator[int, None, None]:
     >>> list(primes(10000))[-1]
     9973
     """
-    numbers: Generator = (i for i in range(1, (max + 1)))
+    numbers: Generator = (i for i in range(1, (max_n + 1)))
     for i in (n for n in numbers if n > 1):
         # only need to check for factors up to sqrt(i)
         bound = int(math.sqrt(i)) + 1
@@ -58,7 +58,7 @@ def primes(max: int) -> Generator[int, None, None]:
             yield i
 
 
-def fast_primes(max: int) -> Generator[int, None, None]:
+def fast_primes(max_n: int) -> Generator[int, None, None]:
     """
     Return a list of all primes numbers up to max.
     >>> list(fast_primes(0))
@@ -76,9 +76,9 @@ def fast_primes(max: int) -> Generator[int, None, None]:
     >>> list(fast_primes(10000))[-1]
     9973
     """
-    numbers: Generator = (i for i in range(1, (max + 1), 2))
+    numbers: Generator = (i for i in range(1, (max_n + 1), 2))
     # It's useless to test even numbers as they will not be prime
-    if max > 2:
+    if max_n > 2:
         yield 2  # Because 2 will not be tested, it's necessary to yield it now
     for i in (n for n in numbers if n > 1):
         bound = int(math.sqrt(i)) + 1

maths/sum_of_arithmetic_series.py

@@ -8,9 +8,9 @@ def sum_of_series(first_term: int, common_diff: int, num_of_terms: int) -> float
     >>> sum_of_series(1, 10, 100)
     49600.0
     """
-    sum = (num_of_terms / 2) * (2 * first_term + (num_of_terms - 1) * common_diff)
+    total = (num_of_terms / 2) * (2 * first_term + (num_of_terms - 1) * common_diff)
     # formula for sum of series
-    return sum
+    return total
 
 
 def main():

neural_network/2_hidden_layers_neural_network.py

@@ -182,7 +182,7 @@ class TwoHiddenLayerNeuralNetwork:
                 loss = numpy.mean(numpy.square(output - self.feedforward()))
                 print(f"Iteration {iteration} Loss: {loss}")
 
-    def predict(self, input: numpy.ndarray) -> int:
+    def predict(self, input_arr: numpy.ndarray) -> int:
         """
         Predict's the output for the given input values using
         the trained neural network.
@@ -201,7 +201,7 @@ class TwoHiddenLayerNeuralNetwork:
         """
 
         # Input values for which the predictions are to be made.
-        self.array = input
+        self.array = input_arr
 
         self.layer_between_input_and_first_hidden_layer = sigmoid(
             numpy.dot(self.array, self.input_layer_and_first_hidden_layer_weights)
@@ -264,7 +264,7 @@ def example() -> int:
     True
     """
     # Input values.
-    input = numpy.array(
+    test_input = numpy.array(
         (
             [0, 0, 0],
             [0, 0, 1],
@@ -282,7 +282,9 @@ def example() -> int:
     output = numpy.array(([0], [1], [1], [0], [1], [0], [0], [1]), dtype=numpy.float64)
 
     # Calling neural network class.
-    neural_network = TwoHiddenLayerNeuralNetwork(input_array=input, output_array=output)
+    neural_network = TwoHiddenLayerNeuralNetwork(
+        input_array=test_input, output_array=output
+    )
 
     # Calling training function.
     # Set give_loss to True if you want to see loss in every iteration.

neural_network/convolution_neural_network.py

@@ -140,24 +140,24 @@ class CNN:
         focus_list = np.asarray(focus1_list)
         return focus_list, data_featuremap
 
-    def pooling(self, featuremaps, size_pooling, type="average_pool"):
+    def pooling(self, featuremaps, size_pooling, pooling_type="average_pool"):
         # pooling process
         size_map = len(featuremaps[0])
         size_pooled = int(size_map / size_pooling)
         featuremap_pooled = []
         for i_map in range(len(featuremaps)):
-            map = featuremaps[i_map]
+            feature_map = featuremaps[i_map]
             map_pooled = []
             for i_focus in range(0, size_map, size_pooling):
                 for j_focus in range(0, size_map, size_pooling):
-                    focus = map[
+                    focus = feature_map[
                         i_focus : i_focus + size_pooling,
                         j_focus : j_focus + size_pooling,
                     ]
-                    if type == "average_pool":
+                    if pooling_type == "average_pool":
                         # average pooling
                         map_pooled.append(np.average(focus))
-                    elif type == "max_pooling":
+                    elif pooling_type == "max_pooling":
                         # max pooling
                         map_pooled.append(np.max(focus))
             map_pooled = np.asmatrix(map_pooled).reshape(size_pooled, size_pooled)

neural_network/perceptron.py

@@ -182,7 +182,7 @@ samples = [
     [0.2012, 0.2611, 5.4631],
 ]
 
-exit = [
+target = [
     -1,
     -1,
     -1,
@@ -222,7 +222,7 @@ if __name__ == "__main__":
     doctest.testmod()
 
     network = Perceptron(
-        sample=samples, target=exit, learning_rate=0.01, epoch_number=1000, bias=-1
+        sample=samples, target=target, learning_rate=0.01, epoch_number=1000, bias=-1
     )
     network.training()
     print("Finished training perceptron")

project_euler/problem_065/sol1.py

@@ -71,7 +71,7 @@ def sum_digits(num: int) -> int:
     return digit_sum
 
 
-def solution(max: int = 100) -> int:
+def solution(max_n: int = 100) -> int:
     """
     Returns the sum of the digits in the numerator of the max-th convergent of
     the continued fraction for e.
@@ -86,7 +86,7 @@ def solution(max: int = 100) -> int:
     pre_numerator = 1
     cur_numerator = 2
 
-    for i in range(2, max + 1):
+    for i in range(2, max_n + 1):
         temp = pre_numerator
         e_cont = 2 * i // 3 if i % 3 == 0 else 1
         pre_numerator = cur_numerator

project_euler/problem_070/sol1.py

@@ -72,7 +72,7 @@ def has_same_digits(num1: int, num2: int) -> bool:
     return sorted(str(num1)) == sorted(str(num2))
 
 
-def solution(max: int = 10000000) -> int:
+def solution(max_n: int = 10000000) -> int:
     """
     Finds the value of n from 1 to max such that n/φ(n) produces a minimum.
 
@@ -85,9 +85,9 @@ def solution(max: int = 10000000) -> int:
 
     min_numerator = 1  # i
     min_denominator = 0  # φ(i)
-    totients = get_totients(max + 1)
+    totients = get_totients(max_n + 1)
 
-    for i in range(2, max + 1):
+    for i in range(2, max_n + 1):
         t = totients[i]
 
         if i * min_denominator < min_numerator * t and has_same_digits(i, t):

sorts/odd_even_sort.py

@@ -20,21 +20,21 @@ def odd_even_sort(input_list: list) -> list:
     >>> odd_even_sort([1 ,2 ,3 ,4])
     [1, 2, 3, 4]
     """
-    sorted = False
+    is_sorted = False
-    while sorted is False:  # Until all the indices are traversed keep looping
+    while is_sorted is False:  # Until all the indices are traversed keep looping
-        sorted = True
+        is_sorted = True
         for i in range(0, len(input_list) - 1, 2):  # iterating over all even indices
             if input_list[i] > input_list[i + 1]:
 
                 input_list[i], input_list[i + 1] = input_list[i + 1], input_list[i]
                 # swapping if elements not in order
-                sorted = False
+                is_sorted = False
 
         for i in range(1, len(input_list) - 1, 2):  # iterating over all odd indices
             if input_list[i] > input_list[i + 1]:
                 input_list[i], input_list[i + 1] = input_list[i + 1], input_list[i]
                 # swapping if elements not in order
-                sorted = False
+                is_sorted = False
     return input_list
 
 

strings/snake_case_to_camel_pascal_case.py

@@ -1,4 +1,4 @@
-def snake_to_camel_case(input: str, use_pascal: bool = False) -> str:
+def snake_to_camel_case(input_str: str, use_pascal: bool = False) -> str:
     """
     Transforms a snake_case given string to camelCase (or PascalCase if indicated)
     (defaults to not use Pascal)
@@ -26,14 +26,14 @@ def snake_to_camel_case(input: str, use_pascal: bool = False) -> str:
     ValueError: Expected boolean as use_pascal parameter, found <class 'str'>
     """
 
-    if not isinstance(input, str):
+    if not isinstance(input_str, str):
-        raise ValueError(f"Expected string as input, found {type(input)}")
+        raise ValueError(f"Expected string as input, found {type(input_str)}")
     if not isinstance(use_pascal, bool):
         raise ValueError(
             f"Expected boolean as use_pascal parameter, found {type(use_pascal)}"
         )
 
-    words = input.split("_")
+    words = input_str.split("_")
 
     start_index = 0 if use_pascal else 1