histogram tools import for testing

tools/helpers/histogramTools.py

 from __future__ import print_function
 
 import matplotlib.pyplot as plt
-import numpy 
-import spam.plotting.greyLevelHistogram
+import numpy
 
 
 def findHistogramPeaks(image, valley1=20000, valley2=[], phases=2, gaussianFit=False, returnSigma=False, mask=True, showGraph=False, greyRange=[0,65535], bins=256):
@@ -54,7 +53,8 @@ def findHistogramPeaks(image, valley1=20000, valley2=[], phases=2, gaussianFit=F
         The peaks of the phases of the image.
     """
     import scipy.optimize
-    
+    import spam.plotting.greyLevelHistogram
+
     def gauss(x,a,mu,sigma, offset):
         return a*numpy.exp(-1*(x-mu)**2/(2*sigma**2))+offset