09: Move stand-alone functionality to function main

Exercise sheet 9/latticescalar.py

@@ -48,6 +48,7 @@ def batch_estimate(data,observable,k):
 	values = np.apply_along_axis(observable, 1, batches)
 	return np.mean(values), np.std(values)/np.sqrt(k-1)
 
+def main():
 	lamb = 1.5
 	kappas = np.linspace(0.08,0.18,11)
 	width = 3
@@ -83,3 +84,6 @@ with h5py.File(output_filename,'a') as f:
 			dataset.attrs["measurements"] = measurements
 			dataset.attrs["start time"] = starttime
 			dataset.attrs["stop time"] = time.asctime()
+
+if __name__ == "__main__":
+	main()