diff --git a/src/ex_cmds.h b/src/ex_cmds.h
index b9ad364..75e1724 100644
--- a/src/ex_cmds.h
+++ b/src/ex_cmds.h
@@ -739,6 +739,8 @@
 			TRLBAR|CMDWIN),
 EX(CMD_python,		"python",	ex_python,
 			RANGE|EXTRA|NEEDARG|CMDWIN),
+EX(CMD_pydo,		"pydo",		ex_pydo,
+			RANGE|DFLALL|EXTRA|NEEDARG|CMDWIN),
 EX(CMD_pyfile,		"pyfile",	ex_pyfile,
 			RANGE|FILE1|NEEDARG|CMDWIN),
 EX(CMD_py3,		"py3",		ex_py3,
diff --git a/src/ex_docmd.c b/src/ex_docmd.c
index 5ce0b5d..056339e 100644
--- a/src/ex_docmd.c
+++ b/src/ex_docmd.c
@@ -268,6 +268,7 @@
 #endif
 #ifndef FEAT_PYTHON
 # define ex_python		ex_script_ni
+# define ex_pydo		ex_ni
 # define ex_pyfile		ex_ni
 #endif
 #ifndef FEAT_PYTHON3
diff --git a/src/if_py_both.h b/src/if_py_both.h
index c25be53..280c248 100644
--- a/src/if_py_both.h
+++ b/src/if_py_both.h
@@ -22,6 +22,7 @@
 #else
 # define ENC_OPT "latin1"
 #endif
+#define DOPY_FUNC "_vim_pydo"
 
 #define PyErr_SetVim(str) PyErr_SetString(VimError, str)
 
diff --git a/src/if_python.c b/src/if_python.c
index baa8cab..5874103 100644
--- a/src/if_python.c
+++ b/src/if_python.c
@@ -198,6 +198,9 @@
 # define PyModule_GetDict dll_PyModule_GetDict
 # define PyRun_SimpleString dll_PyRun_SimpleString
 # define PyRun_String dll_PyRun_String
+# define PyObject_GetAttrString dll_PyObject_GetAttrString
+# define PyObject_SetAttrString dll_PyObject_SetAttrString
+# define PyObject_CallFunctionObjArgs dll_PyObject_CallFunctionObjArgs
 # define PyString_AsString dll_PyString_AsString
 # define PyString_AsStringAndSize dll_PyString_AsStringAndSize
 # define PyString_FromString dll_PyString_FromString
@@ -303,6 +306,9 @@
 static PyObject*(*dll_PyModule_GetDict)(PyObject *);
 static int(*dll_PyRun_SimpleString)(char *);
 static PyObject *(*dll_PyRun_String)(char *, int, PyObject *, PyObject *);
+static PyObject* (*dll_PyObject_GetAttrString)(PyObject *, const char *);
+static PyObject* (*dll_PyObject_SetAttrString)(PyObject *, const char *, PyObject *);
+static PyObject* (*dll_PyObject_CallFunctionObjArgs)(PyObject *, ...);
 static char*(*dll_PyString_AsString)(PyObject *);
 static int(*dll_PyString_AsStringAndSize)(PyObject *, char **, int *);
 static PyObject*(*dll_PyString_FromString)(const char *);
@@ -440,6 +446,9 @@
     {"PyModule_GetDict", (PYTHON_PROC*)&dll_PyModule_GetDict},
     {"PyRun_SimpleString", (PYTHON_PROC*)&dll_PyRun_SimpleString},
     {"PyRun_String", (PYTHON_PROC*)&dll_PyRun_String},
+    {"PyObject_GetAttrString", (PYTHON_PROC*)&dll_PyObject_GetAttrString},
+    {"PyObject_SetAttrString", (PYTHON_PROC*)&dll_PyObject_SetAttrString},
+    {"PyObject_CallFunctionObjArgs", (PYTHON_PROC*)&dll_PyObject_CallFunctionObjArgs},
     {"PyString_AsString", (PYTHON_PROC*)&dll_PyString_AsString},
     {"PyString_AsStringAndSize", (PYTHON_PROC*)&dll_PyString_AsStringAndSize},
     {"PyString_FromString", (PYTHON_PROC*)&dll_PyString_FromString},
@@ -995,6 +1004,93 @@
     DoPythonCommand(eap, buffer, NULL);
 }
 
+    void
+ex_pydo(exarg_T *eap)
+{
+    linenr_T		i;
+    const char		*code_hdr = "def " DOPY_FUNC "(line, linenr):\n ";
+    const char		*s = (const char *) eap->arg;
+    size_t		len;
+    char		*code;
+    int			status;
+    PyObject		*pyfunc, *pymain;
+    PyGILState_STATE	pygilstate;
+
+    if (Python_Init())
+        return;
+
+    if (u_save(eap->line1 - 1, eap->line2 + 1) != OK)
+    {
+	EMSG(_("cannot save undo information"));
+	return;
+    }
+    len = strlen(code_hdr) + strlen(s);
+    code = malloc(len + 1);
+    STRCPY(code, code_hdr);
+    STRNCAT(code, s, len + 1);
+    pygilstate = PyGILState_Ensure();
+    status = PyRun_SimpleString(code);
+    vim_free(code);
+    if (status)
+    {
+	EMSG(_("failed to run the code"));
+	return;
+    }
+    status = 0; /* good */
+    pymain = PyImport_AddModule("__main__");
+    pyfunc = PyObject_GetAttrString(pymain, DOPY_FUNC);
+    PyGILState_Release(pygilstate);
+
+    for (i = eap->line1; i <= eap->line2; i++)
+    {
+	const char *line;
+	PyObject *pyline, *pylinenr, *pyret;
+
+	line = (char *)ml_get(i);
+	pygilstate = PyGILState_Ensure();
+	pyline = PyString_FromStringAndSize(line, strlen(line));
+	pylinenr = PyLong_FromLong(i);
+	pyret = PyObject_CallFunctionObjArgs(pyfunc, pyline, pylinenr, NULL);
+	Py_DECREF(pyline);
+	Py_DECREF(pylinenr);
+	if (!pyret)
+	{
+	    PyErr_PrintEx(0);
+	    PythonIO_Flush();
+	    status = 1;
+	    goto out;
+	}
+
+	if (pyret && pyret != Py_None)
+	{
+	    if (!PyString_Check(pyret))
+	    {
+		EMSG(_("E863: return value must be an instance of str"));
+		Py_XDECREF(pyret);
+		status = 1;
+		goto out;
+	    }
+	    ml_replace(i, (char_u *) PyString_AsString(pyret), 1);
+	    changed();
+#ifdef SYNTAX_HL
+	    syn_changed(i); /* recompute syntax hl. for this line */
+#endif
+	}
+	Py_XDECREF(pyret);
+	PythonIO_Flush();
+	PyGILState_Release(pygilstate);
+    }
+    pygilstate = PyGILState_Ensure();
+out:
+    Py_DECREF(pyfunc);
+    PyObject_SetAttrString(pymain, DOPY_FUNC, NULL);
+    PyGILState_Release(pygilstate);
+    if (status)
+	return;
+    check_cursor();
+    update_curbuf(NOT_VALID);
+}
+
 /******************************************************
  * 2. Python output stream: writes output via [e]msg().
  */
diff --git a/src/if_python3.c b/src/if_python3.c
index 7ceb13d..0aeb2cd 100644
--- a/src/if_python3.c
+++ b/src/if_python3.c
@@ -76,7 +76,6 @@
 #else
 # define CODEC_ERROR_HANDLER NULL
 #endif
-#define DOPY_FUNC "_vim_pydo"
 
 /* Python 3 does not support CObjects, always use Capsules */
 #define PY_USE_CAPSULE
diff --git a/src/proto/if_python.pro b/src/proto/if_python.pro
index 4ba977c..8aa7674 100644
--- a/src/proto/if_python.pro
+++ b/src/proto/if_python.pro
@@ -3,6 +3,7 @@
 void python_end __ARGS((void));
 int python_loaded __ARGS((void));
 void ex_python __ARGS((exarg_T *eap));
+void ex_pydo __ARGS((exarg_T *eap));
 void ex_pyfile __ARGS((exarg_T *eap));
 void python_buffer_free __ARGS((buf_T *buf));
 void python_window_free __ARGS((win_T *win));
diff --git a/src/version.c b/src/version.c
index b76e9c4..97611e4 100644
--- a/src/version.c
+++ b/src/version.c
@@ -729,6 +729,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    966,
+/**/
     965,
 /**/
     964,