ArgsContainer: Add class

ArgsContainer provides an interface similar to
argparse.ArgumentParser and can be used as a drop-in replacement when
fishing for arguments.

Signed-off-by: Jan Lindemann <jan@janware.com>

tools/python/jwutils/ArgsContainer.py

@@ -0,0 +1,62 @@
+# -*- coding: utf-8 -*-
+
+from collections import OrderedDict
+
+from jwutils.log import *
+
+class ArgsContainer: # export
+
+    __args = OrderedDict()
+    __kwargs = OrderedDict()
+    __values = {}
+
+    def __getattr__(self, name):
+        values = self.__values
+        if name in self.__values:
+            return self.__values[name]
+        if name in self.__kwargs.keys():
+            d = self.__kwargs[name]
+            if 'default' in d:
+                return d['default']
+            raise Exception(f'No value for argument "{name}"')
+        raise Exception(f'No argument "{name}" defined')
+
+    def __setattr__(self, name, value):
+        if not name in self.__kwargs.keys():
+            raise Exception(f'No argument "{name}" defined')
+        self.__values[name] = value
+
+    def add_argument(self, *args, **kwargs):
+        for arg in args:
+            if arg[0] != '-':
+                name = arg
+                break
+            if arg[:2] == '--':
+                name = arg[2:]
+                break
+        else:
+            raise Exception('Missing argument name')
+        name = name.replace('-', '_')
+        self.__args[name] = args
+        self.__kwargs[name] = kwargs
+
+    def keys(self):
+        return self.__args.keys()
+
+    @property
+    def args(self, name):
+        return self.__args[name]
+
+    @property
+    def kwargs(self, name):
+        return self.__kwargs[name]
+
+    def dump(self, prio, *args, **kwargs):
+        caller = get_caller_pos(**kwargs)
+        for name in self.__kwargs.keys():
+            val = None
+            try:
+                val = self.__getattr__(name)
+            except:
+                pass
+            slog(prio, f'{name}: {val}', caller=caller)