add doc for inspect.get_func_full_args

docs/inspect.rst

@@ -22,6 +22,16 @@ Inspect
 
 .. py:function:: pydu.inspect.get_func_full_args(func)
 
+    Return a list of (argument name, default value) tuples. If the argument
+    does not have a default value, omit it in the tuple. Arguments such as
+    *args and **kwargs are also included.
+
+    >>> from pydu.inspect import get_func_full_args
+    >>> def f(name, address='home', age=25, *args, **kwargs):
+    ...     pass
+    ...
+    >>> get_func_full_args(f)
+    [('name',), ('address', 'home'), ('age', 25), ('*args',), ('**kwargs',)]
 
 
 .. py:function:: pydu.inspect.func_accepts_kwargs(func)

pydu/inspect.py

@@ -27,7 +27,10 @@ if PY2:
         *args and **kwargs are also included.
         """
         argspec = inspect.getargspec(func)
-        args = argspec.args[1:]  # ignore 'self'
+        if inspect.ismethod(func):
+            args = argspec.args[1:] # ignore 'self'
+        else:
+            args = argspec.args
         defaults = argspec.defaults or []
         # Split args into two lists depending on whether they have default value
         no_default = args[:len(args) - len(defaults)]