Tools: make namelists section optional

mkexp

@@ -574,11 +574,12 @@ for subjob, subconfig in jobs_config.items():
         del subconfig
 
         # Extend all namelists
-        for namelist in job_config['namelists'].sections:
-            groups = job_config['namelists'][namelist]
-            extended_groups = set()
-            for group in groups.sections:
-                extend(group, groups, extended_groups)
+        if 'namelists' in job_config:
+            for namelist in job_config['namelists'].sections:
+                groups = job_config['namelists'][namelist]
+                extended_groups = set()
+                for group in groups.sections:
+                    extend(group, groups, extended_groups)
 
         # Prepare namelists for inclusion in scripts
         var_format = job_config['JOB'].get('.var_format', '${%s}')
@@ -588,45 +589,46 @@ for subjob, subconfig in jobs_config.items():
         expconfig.merge_comments(job_config['jobs'], jobs_config)
         job_config.walk(format_vars, log=var_list, fmt=var_format)
         job_config['VARIABLES_'] = var_list
-        for namelist, groups in job_config['namelists'].items():
-            if isinstance(groups, dict):
-                # Replace id placeholder in namelist groups
-                for group_id, group in groups.items():
-                    group_base, group_ident = expconfig.section_key_info(
-                        group_id)
-                    if group_ident:
-                        for key in group.scalars:
-                            value_repr = repr(group[key])
-                            if '%{id}' in value_repr:
-                                group[key] = eval(value_repr.replace('%{id}',
-                                    group_ident))
-                # Skip hidden namelists
-                if is_set(groups.get('.hide')):
-                    continue
-                # Support deprecated keyword 'use_template' but warn user
-                if groups.get('use_template'):
-                    keyword_warning('use_template')
-
-                namelist_name = re.sub(r'\W', '_', namelist.upper())
-                use_template = (groups.get('.use_template') or
-                                groups.get('use_template') or '')
-                use_full_config = groups.get('.use_full_config', '')
-                if use_full_config.lower() == 'true':
-                    namelist_config = ConfigObj(job_config)
-                    namelist_config['_'] = job_config
-                    namelist_config.merge(expconfig.odict(groups))
-                    expconfig.merge_comments(namelist_config, groups)
-                else:
-                    namelist_config = groups
-                if use_template:
-                    if use_template.lower() == 'true':
-                        use_template = namelist
-                    job_config[namelist_name] = expand_template(
-                        namelist_config, get_exp_template_names(
-                            experiment_config_id, config, use_template))
-                else:
-                    job_config[namelist_name] = format_namelist(
-                        namelist_config)
+        if 'namelists' in job_config:
+            for namelist, groups in job_config['namelists'].items():
+                if isinstance(groups, dict):
+                    # Replace id placeholder in namelist groups
+                    for group_id, group in groups.items():
+                        group_base, group_ident = expconfig.section_key_info(
+                            group_id)
+                        if group_ident:
+                            for key in group.scalars:
+                                value_repr = repr(group[key])
+                                if '%{id}' in value_repr:
+                                    group[key] = eval(value_repr.replace('%{id}',
+                                        group_ident))
+                    # Skip hidden namelists
+                    if is_set(groups.get('.hide')):
+                        continue
+                    # Support deprecated keyword 'use_template' but warn user
+                    if groups.get('use_template'):
+                        keyword_warning('use_template')
+
+                    namelist_name = re.sub(r'\W', '_', namelist.upper())
+                    use_template = (groups.get('.use_template') or
+                                    groups.get('use_template') or '')
+                    use_full_config = groups.get('.use_full_config', '')
+                    if use_full_config.lower() == 'true':
+                        namelist_config = ConfigObj(job_config)
+                        namelist_config['_'] = job_config
+                        namelist_config.merge(expconfig.odict(groups))
+                        expconfig.merge_comments(namelist_config, groups)
+                    else:
+                        namelist_config = groups
+                    if use_template:
+                        if use_template.lower() == 'true':
+                            use_template = namelist
+                        job_config[namelist_name] = expand_template(
+                            namelist_config, get_exp_template_names(
+                                experiment_config_id, config, use_template))
+                    else:
+                        job_config[namelist_name] = format_namelist(
+                            namelist_config)
 
         # Generate job script
         template_search_list = ()