diff -r b74897b69184 Lib/pdb.py
--- a/Lib/pdb.py	Wed Nov 02 20:33:07 2016 -0400
+++ b/Lib/pdb.py	Sat Nov 05 17:40:41 2016 +0100
@@ -80,6 +80,7 @@
 import inspect
 import traceback
 import linecache
+import types
 
 
 class Restart(Exception):
@@ -1584,6 +1585,52 @@
 def set_trace():
     Pdb().set_trace(sys._getframe().f_back)
 
+def _compile(source, globs=None, locs=None):
+    class Loader:
+        def get_source(self, fname):
+            return source
+
+    f = sys._getframe().f_back.f_back
+    g = f.f_globals if globs is None else globs
+    l = f.f_locals if locs is None else locs
+    trace  = sys.gettrace()
+    if isinstance(trace, types.MethodType) and trace.__module__ == 'bdb':
+        _pdb = trace.__self__
+        skip = _pdb.skip
+        _pdb.skip = set(['pdb']) if skip is None else skip.update(['pdb'])
+        # When the last frame where pdb stopped is in pdb, set stopframe to
+        # None otherwise stopframe may remain set to this frame until pdb
+        # exits (unless stopped at a breakpoint).
+        if (_pdb.stopframe and
+                _pdb.stopframe.f_globals.get('__name__') == 'pdb'):
+            _pdb.stopframe = None
+
+        if isinstance(source, (str, bytes)):
+            globs = {}
+            globs.update(g)
+            globs['__loader__'] = Loader()
+            globs['__name__'] = 'pdb_tmp_script'
+            g = globs
+            code = compile(source, 'pdb_tmp_script.py', 'exec')
+        else:
+            code =source
+    else:
+        code = compile(source, '<string>', 'exec')
+    return code, g, l
+
+def exec_script(source, globs=None, locs=None):
+    """Execute Python code while enabling the source debugging of this code.
+
+    'source' is source debugged if this is a string and a pdb instance is
+    running.  The source debugging of the pdb module itself is skipped by the
+    pdb instance upon the first invocation of this function and on the
+    following invocations pdb will step direcly into 'source', skipping the
+    statements executed by exec_script() itself.
+
+    """
+    code, globals, locals = _compile(source, globs, locs)
+    exec(code, globals, locals)
+
 # Post-Mortem interface
 
 def post_mortem(t=None):