Fix ruff errors (#8936)

* Fix ruff errors

Renamed neural_network/input_data.py to neural_network/input_data.py_tf
because it should be left out of the directory for the following
reasons:

1. Its sole purpose is to be used by neural_network/gan.py_tf, which is
   itself left out of the directory because of issues with TensorFlow.

2. It was taken directly from TensorFlow's codebase and is actually
   already deprecated. If/when neural_network/gan.py_tf is eventually
   re-added back to the directory, its implementation should be changed
   to not use neural_network/input_data.py anyway.

* updating DIRECTORY.md

* Change input_data.py_tf file extension

Change input_data.py_tf file extension because algorithms-keeper bot is being picky about it

---------

Co-authored-by: github-actions <${GITHUB_ACTOR}@users.noreply.github.com>

maths/area_under_curve.py

@@ -7,9 +7,9 @@ from collections.abc import Callable
 
 
 def trapezoidal_area(
-    fnc: Callable[[int | float], int | float],
-    x_start: int | float,
-    x_end: int | float,
+    fnc: Callable[[float], float],
+    x_start: float,
+    x_end: float,
     steps: int = 100,
 ) -> float:
     """

maths/decimal_to_fraction.py

@@ -1,4 +1,4 @@
-def decimal_to_fraction(decimal: int | float | str) -> tuple[int, int]:
+def decimal_to_fraction(decimal: float | str) -> tuple[int, int]:
     """
     Return a decimal number in its simplest fraction form
     >>> decimal_to_fraction(2)

maths/line_length.py

@@ -5,9 +5,9 @@ from collections.abc import Callable
 
 
 def line_length(
-    fnc: Callable[[int | float], int | float],
-    x_start: int | float,
-    x_end: int | float,
+    fnc: Callable[[float], float],
+    x_start: float,
+    x_end: float,
     steps: int = 100,
 ) -> float:
     """

maths/numerical_integration.py

@@ -7,9 +7,9 @@ from collections.abc import Callable
 
 
 def trapezoidal_area(
-    fnc: Callable[[int | float], int | float],
-    x_start: int | float,
-    x_end: int | float,
+    fnc: Callable[[float], float],
+    x_start: float,
+    x_end: float,
     steps: int = 100,
 ) -> float:
     """

maths/polynomials/single_indeterminate_operations.py

@@ -87,7 +87,7 @@ class Polynomial:
 
         return Polynomial(self.degree + polynomial_2.degree, coefficients)
 
-    def evaluate(self, substitution: int | float) -> int | float:
+    def evaluate(self, substitution: float) -> float:
         """
         Evaluates the polynomial at x.
         >>> p = Polynomial(2, [1, 2, 3])
@@ -144,7 +144,7 @@ class Polynomial:
             coefficients[i] = self.coefficients[i + 1] * (i + 1)
         return Polynomial(self.degree - 1, coefficients)
 
-    def integral(self, constant: int | float = 0) -> Polynomial:
+    def integral(self, constant: float = 0) -> Polynomial:
         """
         Returns the integral of the polynomial.
         >>> p = Polynomial(2, [1, 2, 3])

maths/series/geometric_series.py

@@ -14,10 +14,10 @@ from __future__ import annotations
 
 
 def geometric_series(
-    nth_term: float | int,
-    start_term_a: float | int,
-    common_ratio_r: float | int,
-) -> list[float | int]:
+    nth_term: float,
+    start_term_a: float,
+    common_ratio_r: float,
+) -> list[float]:
     """
     Pure Python implementation of Geometric Series algorithm
 
@@ -48,7 +48,7 @@ def geometric_series(
     """
     if not all((nth_term, start_term_a, common_ratio_r)):
         return []
-    series: list[float | int] = []
+    series: list[float] = []
     power = 1
     multiple = common_ratio_r
     for _ in range(int(nth_term)):

maths/series/p_series.py

@@ -13,7 +13,7 @@ python3 p_series.py
 from __future__ import annotations
 
 
-def p_series(nth_term: int | float | str, power: int | float | str) -> list[str]:
+def p_series(nth_term: float | str, power: float | str) -> list[str]:
     """
     Pure Python implementation of P-Series algorithm
     :return: The P-Series starting from 1 to last (nth) term

maths/volume.py

@@ -8,7 +8,7 @@ from __future__ import annotations
 from math import pi, pow
 
 
-def vol_cube(side_length: int | float) -> float:
+def vol_cube(side_length: float) -> float:
     """
     Calculate the Volume of a Cube.
     >>> vol_cube(1)