change print to logging

tupak/prior.py

@@ -474,7 +474,7 @@ def write_priors_to_file(priors, outdir):
     if outdir[-1] != "/":
         outdir += "/"
     prior_file = outdir + "prior.txt"
-    print("Writing priors to {}".format(prior_file))
+    logging.info("Writing priors to {}".format(prior_file))
     with open(prior_file, "w") as outfile:
         for key in priors:
             outfile.write("prior['{}'] = {}\n".format(key, priors[key]))