create localhost also in module2

Author: GeigerJ2

docs/source/tutorials/module2.md

@@ -48,6 +48,8 @@ load_profile()
 
 # Shared tutorial profile — see Module 1 for details.
 import os
+import pathlib
+import sys
 
 from aiida.manage.configuration import create_profile, get_config
 
@@ -76,19 +78,34 @@ from aiida import load_profile
 load_profile(profile_name, allow_switch=True)
 os.environ['AIIDA_PROFILE'] = profile_name
 
-# Pre-register a Code with a short label so that `verdi process list`
-# shows "python3@localhost" instead of the full virtualenv path.
-import sys
-
+# Ensure a localhost Computer exists (create_profile does not create one,
+# unlike ``verdi presto``).
 from aiida.common.exceptions import NotExistent
-from aiida.orm import InstalledCode, load_code, load_computer
+from aiida.orm import Computer, InstalledCode, load_code, load_computer
 
+try:
+    computer = load_computer('localhost')
+except NotExistent:
+    computer = Computer(
+        label='localhost',
+        hostname='localhost',
+        description='Localhost for tutorial',
+        transport_type='core.local',
+        scheduler_type='core.direct',
+        workdir=str(pathlib.Path(config.dirpath) / 'scratch' / profile_name),
+    ).store()
+    computer.configure(safe_interval=0)
+    computer.set_minimum_job_poll_interval(1)
+    computer.set_default_mpiprocs_per_machine(1)
+
+# Pre-register a Code with a short label so that `verdi process list`
+# shows "python3@localhost" instead of the full virtualenv path.
 try:
     python_code = load_code('python3@localhost')
 except NotExistent:
     python_code = InstalledCode(
         label='python3',
-        computer=load_computer('localhost'),
+        computer=computer,
         filepath_executable=sys.executable,
         default_calc_job_plugin='core.shell',
     ).store()