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

for more information, see https://pre-commit.ci

Author: pre-commit-ci[bot]

Diff for: greedy_methods/fractional_knapsack.py

@@ -48,8 +48,7 @@ def frac_knapsack(
     """
 
     # sort in descending order of value/weight ratio
-    r = sorted(zip(values, weights),
-               key=lambda x: x[0] / x[1], reverse=True)
+    r = sorted(zip(values, weights), key=lambda x: x[0] / x[1], reverse=True)
 
     values, weights = [i[0] for i in r], [i[1] for i in r]  # unzip the list
     acc = list(accumulate(weights))  # cumulative sum of weights