Index: fact/tools/pyscripts/pyfact/fir_filter.py
===================================================================
--- fact/tools/pyscripts/pyfact/fir_filter.py	(revision 13231)
+++ fact/tools/pyscripts/pyfact/fir_filter.py	(revision 13232)
@@ -7,5 +7,4 @@
 from scipy import signal
 
-import matplotlib.pyplot as plt
 
 class FirFilter(object):
@@ -169,4 +168,5 @@
 
 if __name__ == '__main__':
+    import matplotlib.pyplot as plt
     """ test the class """