moved checksum to before error assert for intraspecies DD fusion regr…

…ession test analysis script.

Examples/Tests/nuclear_fusion/analysis_deuterium_deuterium_3d_intraspecies.py

@@ -45,11 +45,13 @@
 V = (2e-3)**3 # simulation volume in m^3
 sigma = dY_dt*(1+delta_ij)/(nD**2)/V*(1e2)**3
 
+# Compare checksums with benchmark
+test_name = os.path.split(os.getcwd())[1]
+checksumAPI.evaluate_checksum(test_name, fn)
+
 sigma_th = 2.603e-18
 error = np.abs(sigma-sigma_th)/sigma_th
 tolerance = 1e-2
+print('error = ', error)
+print('tolerance = ', tolerance)
 assert error < tolerance
-
-# Compare checksums with benchmark
-test_name = os.path.split(os.getcwd())[1]
-checksumAPI.evaluate_checksum(test_name, fn)