Remove custom clone method and use copy.deepcopy

Author: dittos

graphql/core/language/visitor.py

@@ -1,4 +1,4 @@
-from copy import copy
+from copy import copy, deepcopy
 from collections import namedtuple
 from . import ast
 
@@ -78,7 +78,7 @@ def visit(root, visitor, key_map=None):
                         if isinstance(node, list):
                             node[edit_key] = edit_value
                         else:
-                            node = node.clone()
+                            node = deepcopy(node)
                             setattr(node, edit_key, edit_value)
             index = stack.index
             keys = stack.keys

scripts/generate_ast.py

@@ -56,7 +56,6 @@ def end_type(self, typename):
         typename = remap_type(typename)
         self._print_slots()
         self._print_ctor()
-        self._print_clone_method(typename)
         self._print_comparator(typename)
         self._print_repr(typename)
         self._fields = []
@@ -76,14 +75,6 @@ def __init__(self, {ctor_args}, loc=None):
         for type, name, nullable, plural in self._fields:
             print '''        self.{name} = {name}'''.format(name=snake(name))
 
-    def _print_clone_method(self, typename):
-        print '''
-    def clone(self):
-        return {typename}('''.format(typename=typename)
-        for type, name, nullable, plural in self._fields:
-            print '''            {name}=self.{name},'''.format(name=snake(name))
-        print '        )'
-
     def _print_comparator(self, typename):
         print '''
     def __eq__(self, other):