diff -r a30cdf366c02 Lib/ctypes/__init__.py
--- a/Lib/ctypes/__init__.py	Tue Jan 10 11:30:44 2017 +0800
+++ b/Lib/ctypes/__init__.py	Tue Jan 10 22:42:02 2017 +0200
@@ -324,6 +324,10 @@ class CDLL(object):
     """
     _func_flags_ = _FUNCFLAG_CDECL
     _func_restype_ = c_int
+    # default values for repr
+    _name = '<uninitialized>'
+    _handle = 0
+    _FuncPtr = None
 
     def __init__(self, name, mode=DEFAULT_MODE, handle=None,
                  use_errno=False,