example: groups work-around

* Added groups selection work around code.
* Intended for use as a module to be imported by other scripts,
  usually with "from groups import group_lists" or "from groups import
  group_lines" or similar.

lang/python/examples/howto/groups.py

@@ -0,0 +1,44 @@
+# -*- coding: utf-8 -*-
+
+from __future__ import absolute_import, division, unicode_literals
+
+# Copyright (C) 2018 Ben McGinnes <ben@gnupg.org>
+#
+# This program is free software; you can redistribute it and/or modify it under
+# the terms of the GNU General Public License as published by the Free Software
+# Foundation; either version 2 of the License, or (at your option) any later
+# version.
+#
+# This program is free software; you can redistribute it and/or modify it under
+# the terms of the GNU Lesser General Public License as published by the Free
+# Software Foundation; either version 2.1 of the License, or (at your option)
+# any later version.
+#
+# This program is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+# FOR A PARTICULAR PURPOSE.  See the GNU General Public License and the GNU
+# Lesser General Public Licensefor more details.
+#
+# You should have received a copy of the GNU General Public License and the GNU
+# Lesser General Public along with this program; if not, see
+# <http://www.gnu.org/licenses/>.
+
+import subprocess
+
+lines = subprocess.getoutput("gpgconf --list-options gpg").splitlines()
+
+for i in range(len(lines)):
+    if lines[i].startswith("group") is True:
+        line = lines[i]
+    else:
+        pass
+
+groups = line.split(":")[-1].replace('"', '').split(',')
+
+group_lines = groups
+for i in range(len(group_lines)):
+    group_lines[i] = group_lines[i].split("=")
+
+group_lists = group_lines
+for i in range(len(group_lists)):
+    group_lists[i][1] = group_lists[i][1].split()