Adopted new convention from template

src/Python/Problem057.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python3
+#!/usr/bin/env python
 """
 Created on 09 Oct 2021
 
@@ -10,6 +10,7 @@ https://projecteuler.net/problem=57
 """
 
 from fractions import Fraction
+
 from utils import timeit
 
 
@@ -21,7 +22,7 @@ def compute():
 
     By expanding this for the first four iterations, we get:
 
-        1 +  1/2 = 3/2 = 1.5
+        1 + 1/2 = 3/2 = 1.5
         1 + 1/2+1/2 = 7/5 = 1.4
         1 + 1/2+1/2+1/2 = 17/12 = 1.41666...
         1 + 1/2+1/2+1/2+1/2 = 41/29 = 1.41379...
@@ -36,7 +37,7 @@ def compute():
 
     ans = 0
     f = Fraction(1, 2)
-    for i in range(1000):
+    for _ in range(1000):
         f = 1 / (2 + f)
         result = 1 + f
         if len(str(result.numerator)) > len(str(result.denominator)):
@@ -46,5 +47,4 @@ def compute():
 
 
 if __name__ == "__main__":
-
-    print(f"Result for Problem 57: {compute()}")
+    print(f"Result for Problem 57 is {compute()}")