'Refactored by Sourcery'

euclid.py

@@ -16,7 +16,4 @@ def gcd2(a, b):
 
 
 def gcd3(a, b):
-    if b == 0:
-        return a
-    else:
-        return gcd(b, a % b)
+    return a if b == 0 else gcd(b, a % b)

legendre_symbol_small.py

@@ -7,10 +7,7 @@ def legendre_symbol(a, p):
 
     ls = pow(a, (p - 1) // 2, p)
 
-    if ls == p - 1:
-        return -1
-    else:
-        return ls
+    return -1 if ls == p - 1 else ls
 
 
 def test():

polysolv.py

@@ -103,12 +103,11 @@ def factor_poly(Poly, Grade):
     terms = []
     for grade in range(Grade, 1, -1):
         result = poly_synthetic_div_complete_step(P, grade)
-        if result != None:
-            P, term = result
-            terms += term
-        else:
+        if result is None:
             break
-    terms += ["(%s)" % poly_to_text(P, grade)]
+        P, term = result
+        terms += term
+    terms += [f"({poly_to_text(P, grade)})"]
     print(("=" * 60))
     s = sanitize("".join(terms))
     print(("Result:", s))