Index: fact/tools/pyscripts/pyfact/coor.py
===================================================================
--- fact/tools/pyscripts/pyfact/coor.py	(revision 13230)
+++ fact/tools/pyscripts/pyfact/coor.py	(revision 13231)
@@ -5,5 +5,5 @@
 import os.path
 import numpy as np
-from pylab import *
+import math
 from euclid import *
 
@@ -40,5 +40,5 @@
         center = Vector2( 0. , 1./2.)
         ey = Vector2( 0. , 1. )
-        ex = Vector2( sqrt(3)/2. , 1./2. )
+        ex = Vector2( math.sqrt(3)/2. , 1./2. )
         self.center = ( center.x , center.y )
         self.ey =  ( ey.x, ey.y)