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

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Author: pre-commit-ci[bot]

maths/series/logarithmic_series.py

@@ -3,46 +3,49 @@
 Reference: https://math.stackexchange.com/questions/3973429/what-is-a-logarithmic-series
 """
 
+
 def logarithmic_series(x: float, n_terms: int = 5, expand: bool = False) -> list:
     """
     Returns the logarithmic series for a number x (log x) upto n terms.
-    
+
     Parameters:
         x: a floating point number for log(x)
         n_terms: number of terms to be computed
         expand: Set this flag to get the terms as real numbers, unset for unsolved expressions
-    
+
     Examples:
         >>> logarithmic_series(3)
         ['(2^1)/1', '-(2^2)/2', '(2^3)/3', '-(2^4)/4', '(2^5)/5']
-        
+
         >>> logarithmic_series(-3)
         ['-(4^1)/1', '(4^2)/2', '-(4^3)/3', '(4^4)/4', '-(4^5)/5']
-        
+
         >>> logarithmic_series(3, 10)
         ['(2^1)/1', '-(2^2)/2', '(2^3)/3', '-(2^4)/4', '(2^5)/5', '-(2^6)/6', '(2^7)/7', '-(2^8)/8', '(2^9)/9', '-(2^10)/10']
-        
+
         >>> logarithmic_series(3, expand=True)
         [2.0, -2.0, 2.6666666666666665, -4.0, 6.4]
     """
-    n_times_x_minus_1: float = x-1
+    n_times_x_minus_1: float = x - 1
     n: int = 1
     series: list = []
     for _ in range(n_terms):
-        if (expand):
-            series.append(((-1)**(n+1))*(n_times_x_minus_1/n))
-            n_times_x_minus_1 *= (x-1)
+        if expand:
+            series.append(((-1) ** (n + 1)) * (n_times_x_minus_1 / n))
+            n_times_x_minus_1 *= x - 1
         else:
-            sign: str = '-' if (-1)**(n+1) == -1 else ''
-            term: str = sign+'('+str(x-1)+'^'+str(n)+')'+'/'+str(n)
-            if (term.startswith("-(-")):
-                term = '('+term[3::]
-            elif (term.startswith("(-")):
-                term = "-("+term[2::]
+            sign: str = "-" if (-1) ** (n + 1) == -1 else ""
+            term: str = sign + "(" + str(x - 1) + "^" + str(n) + ")" + "/" + str(n)
+            if term.startswith("-(-"):
+                term = "(" + term[3::]
+            elif term.startswith("(-"):
+                term = "-(" + term[2::]
             series.append(term)
         n += 1
     return series
 
-if (__name__ == "__main__"):
+
+if __name__ == "__main__":
     import doctest
+
     doctest.testmod()