Improve argument wrapper

amanuensis/__main__.py

@@ -33,7 +33,7 @@ def get_parser(valid_commands):
 	# whether their argument is an ArgumentParser.
 	for name, func in valid_commands.items():
 		# Create the subparser.
-		cmd = subp.add_parser(name)
+		cmd = subp.add_parser(name, description=func.__doc__)
 		# Delegate subparser setup.
 		func(cmd)
 		# Store function for later execution

amanuensis/cli.py

@@ -1,21 +1,28 @@
 # Standard library imports
 from argparse import ArgumentParser as AP
+from functools import wraps
 
 
 def add_argument(*args, **kwargs):
 	def argument_adder(command):
+		@wraps(command)
 		def augmented_command(cmd_args):
 			if type(cmd_args) is AP:
 				cmd_args.add_argument(*args, **kwargs)
 			else:
 				command(cmd_args)
-		augmented_command.__doc__ = command.__doc__
 		return augmented_command
 	return argument_adder
 
+def no_argument(command):
+	@wraps(command)
+	def augmented_command(cmd_args):
+		if type(cmd_args) is not AP:
+			command(cmd_args)
+	return augmented_command
+
 @add_argument("--foo", action="store_true")
 def command_a(args):
 	"""a docstring"""
 	print(args.foo)
 
-