Fixes issue #194 - removed duplicate import statement

docs/code/reliability/form/local_pfn.py

@@ -6,17 +6,17 @@
 """
 import numpy as np
 
+
 def example1(samples=None):
     g = np.zeros(samples.shape[0])
     for i in range(samples.shape[0]):         
         R = samples[i, 0]
         S = samples[i, 1]
         g[i] = R - S
     return g
-    
+
 
 def example2(samples=None):
-    import numpy as np
     d = 2
     beta = 3.0902
     g = np.zeros(samples.shape[0])
@@ -30,9 +30,10 @@ def example3(samples=None):
     for i in range(samples.shape[0]):
         g[i] = 6.2*samples[i, 0] - samples[i, 1]*samples[i, 2]**2
     return g
-
+
+
 def example4(samples=None):
     g = np.zeros(samples.shape[0])
     for i in range(samples.shape[0]):
         g[i] = samples[i, 0]*samples[i, 1] - 80
-    return g
+    return g