run command line scripts under ipython since png rendering with savef…

…ig is significantly faster

python/ssh_dispatcher.py

@@ -114,7 +114,7 @@ def launch_script(self, remote_host, task_id, *args):
         command += f'"cd {working_dir}; source {setup}; '
         for key, value in self.lcatr_envs.items():
             command += f'export {key}={value}; '
-        command += f'(echo; {script} {task_id} '
+        command += f'(echo; ipython {script} {task_id} '
         command += ' '.join([str(_) for _ in args])
         command += r' && echo Task succeeded on \`hostname\`'
         command += r' || echo Task failed on \`hostname\`)'