Use our own hypot() for older Python support

mosfet/world.py

@@ -2,7 +2,6 @@ import collections
 import re
 import time
 import random
-from math import hypot
 from itertools import count
 from copy import copy
 
@@ -35,7 +34,7 @@ class World:
                 continue
             if y_limit and abs(cur[1]) > y_limit:
                 continue
-            if distance and hypot(*cur) > distance:
+            if distance and utils.hypot(*cur) > distance:
                 continue
 
             check = utils.padd(center, cur)
@@ -76,7 +75,7 @@ class World:
             offset = utils.spiral(n)
             check = utils.padd(center, offset)
             if self.block_at(*check) in block_ids:
-                if hypot(*offset) < distance:
+                if utils.hypot(*offset) < distance:
                     result.append(check)
             if limit and len(result) == limit:
                 return result