'Refactored by Sourcery'

Author: Sourcery AI

Numbers/binary_decimal.py

@@ -27,8 +27,7 @@ def decimal_to_binary(decimal):
         remainders.append(str(decimal % 2))
         decimal /= 2
     remainders.reverse()
-    binary = "".join(remainders)
-    return binary
+    return "".join(remainders)
 
 if __name__ == '__main__':
     print """

Numbers/prime.py

@@ -5,10 +5,7 @@
 import math
 
 def is_a_prime(x):
-    for i in range(2, x):
-        if x % i == 0:
-            return False
-    return True
+    return all(x % i != 0 for i in range(2, x))
 
 # standard boilerplate
 if __name__ == '__main__':