Provide some useful __repr__s

CHANGES

@@ -9,6 +9,7 @@ Injector Change Log
 - deprecated injecting arguments into modules (be it functions/callables,
   :class:`~injector.Module` constructors or :meth:`injector.Module.configure` methods)
 - removed `extends` decorator
+- few classes got useful __repr__ implementations
 
 0.9.1
 -----

injector.py

@@ -169,6 +169,9 @@ def __init__(self, callable):
     def get(self, injector):
         return injector.call_with_injection(self._callable)
 
+    def __repr__(self):
+        return '%s(%r)' % (type(self).__name__, self._callable)
+
 
 class InstanceProvider(Provider):
     """Provide a specific instance.
@@ -193,6 +196,10 @@ def __init__(self, instance):
     def get(self, injector):
         return self._instance
 
+    def __repr__(self):
+        return '%s(%r)' % (type(self).__name__, self._instance)
+
+
 
 @private
 class ListOfProviders(Provider):
@@ -207,6 +214,9 @@ def append(self, provider):
     def get(self, injector):
         return [provider.get(injector) for provider in self._providers]
 
+    def __repr__(self):
+        return '%s(%r)' % (type(self).__name__, self._providers)
+
 
 class MultiBindProvider(ListOfProviders):
     """Used by :meth:`Binder.multibind` to flatten results of providers that