diff -r f40f015258fc Lib/inspect.py
--- a/Lib/inspect.py	Sun Sep 15 15:40:18 2013 -0500
+++ b/Lib/inspect.py	Mon Sep 16 19:57:07 2013 +0300
@@ -2109,3 +2109,49 @@
             rendered += ' -> {}'.format(anno)
 
         return rendered
+
+def _main():
+    """ Logic for inspecting an object given at command line """
+    import argparse
+    import importlib
+
+    parser = argparse.ArgumentParser()
+    parser.add_argument(
+        'object',
+         help="The object to be analysed. "
+              "It supports the 'module:qualname' syntax")
+    parser.add_argument(
+        '-s', '--source', action='store_true',
+        help='Dump the source of the object')
+
+    args = parser.parse_args()
+
+    mod = args.object
+    if mod.find(":") > -1:
+        module, attrs = mod.split(":", 1)
+        loaded_module = importlib.import_module(module)
+        parts = attrs.split(".")         
+        obj = loaded_module
+        for part in parts:
+            obj = getattr(obj, part)
+    else:
+        obj = loaded_module = importlib.import_module(mod)
+
+    if loaded_module.__name__ in sys.builtin_module_names:
+        print("Can't get info for builtin modules.", file=sys.stderr)
+        exit(1)
+
+    print('\nHEADERS\n-------\n')
+    print('Origin: {}'.format(getsourcefile(loaded_module)))
+    print('Cached: {}'.format(loaded_module.__cached__))
+    print('Loader: {}'.format(repr(loaded_module.__loader__)))
+    if loaded_module.__package__:
+        package = importlib.import_module(loaded_module.__package__)
+        print('Submodule search path: {}'.format(package.__path__))
+    print('\n')
+
+    if args.source:
+        print(getsource(obj))
+
+if __name__ == "__main__":
+    _main()
diff -r f40f015258fc Lib/test/test_inspect.py
--- a/Lib/test/test_inspect.py	Sun Sep 15 15:40:18 2013 -0500
+++ b/Lib/test/test_inspect.py	Mon Sep 16 19:57:07 2013 +0300
@@ -9,10 +9,11 @@
 import os
 import shutil
 import functools
+import importlib
 from os.path import normcase
 
 from test.support import run_unittest, TESTFN, DirsOnSysPath
-
+from test.script_helper import assert_python_ok, assert_python_failure
 from test import inspect_fodder as mod
 from test import inspect_fodder2 as mod2
 
@@ -2372,6 +2373,36 @@
             __wrapped__ = func
         self.assertIsNone(inspect.unwrap(C()))
 
+class TestMain(unittest.TestCase):
+    def test_only_source(self):
+        module = importlib.import_module('unittest')
+        rc, out, err = assert_python_ok('-m', 'inspect', 
+                                        'unittest', '--source')
+        lines = out.decode().splitlines()
+        # ignore the info section and the final newline
+        self.assertEqual(lines[10:-1], inspect.getsource(module).splitlines())
+        self.assertEqual(err, b'')
+
+    def test_qualname_source(self):
+        module = importlib.import_module('concurrent.futures')
+        member = getattr(module, 'ThreadPoolExecutor')
+        rc, out, err = assert_python_ok('-m', 'inspect', 
+                                     'concurrent.futures:ThreadPoolExecutor', 
+                                     '--source')
+        lines = out.decode().splitlines()
+        # ignore the info section and the final newline
+        self.assertEqual(lines[10:-1], 
+                         inspect.getsource(member).splitlines())
+        self.assertEqual(err, b'')
+
+    def test_builtins(self):
+        module = importlib.import_module('unittest')
+        _, out, err = assert_python_failure('-m', 'inspect', 
+                                            'sys', '--source')
+        lines = err.decode().splitlines()
+        self.assertEqual(lines, ["Can't get info for builtin modules."])
+
+
 
 def test_main():
     run_unittest(
@@ -2380,7 +2411,7 @@
         TestGetcallargsFunctions, TestGetcallargsMethods,
         TestGetcallargsUnboundMethods, TestGetattrStatic, TestGetGeneratorState,
         TestNoEOL, TestSignatureObject, TestSignatureBind, TestParameterObject,
-        TestBoundArguments, TestGetClosureVars, TestUnwrap
+        TestBoundArguments, TestGetClosureVars, TestUnwrap, TestMain
     )
 
 if __name__ == "__main__":