add issequence function to data and plot functions and examples for geometry

tests/test_fit.py

@@ -13,9 +13,9 @@ import unittest
 import os
 import sys
 from pylab import array, argmax, subplot, plot, title, xlim, show, gradient, linspace
-sys.path.insert(0, os.path.abspath('../pylib'))
-from data import data_read
-from numerical.fit import gauss_fit
+sys.path.insert(0, os.path.abspath('..'))
+from pylib.data import read
+from pylib.numerical.fit import gauss_fit
 
 
 class TestFit(unittest.TestCase):
@@ -23,7 +23,7 @@ class TestFit(unittest.TestCase):
   def test_gauss(self):
     """test function"""
     file_name = "test_fit.dat"
-    x, y = data_read(file_name, 3, 2)
+    x, y = read(file_name, 3, 2)
 
     subplot(2, 2, 1)
     plot(x, y, '.-')