make _copy a core module

Author: eendebakpt

Lib/copy.py

@@ -179,26 +179,13 @@ def _deepcopy_fallback(x, memo=None, _nil=[]):
         _keep_alive(x, memo) # Make sure x lives at least as long as d
     return y
 
-try:
-    from _copy import deepcopy
-except ImportError as ex:
-    deepcopy = _deepcopy_fallback
+from _copy import deepcopy
 
 _deepcopy_dispatch = d = {}
 
 def _deepcopy_atomic(x, memo):
     return x
-d[type(None)] = _deepcopy_atomic
-d[type(Ellipsis)] = _deepcopy_atomic
-d[type(NotImplemented)] = _deepcopy_atomic
-d[int] = _deepcopy_atomic
-d[float] = _deepcopy_atomic
-d[bool] = _deepcopy_atomic
-d[complex] = _deepcopy_atomic
-d[bytes] = _deepcopy_atomic
-d[str] = _deepcopy_atomic
 d[types.CodeType] = _deepcopy_atomic
-d[type] = _deepcopy_atomic
 d[range] = _deepcopy_atomic
 d[types.BuiltinFunctionType] = _deepcopy_atomic
 d[types.FunctionType] = _deepcopy_atomic

Modules/Setup.bootstrap.in

@@ -25,6 +25,7 @@ _weakref _weakref.c
 
 # commonly used core modules
 _abc _abc.c
+_copy _copy.c
 _functools _functoolsmodule.c
 _locale _localemodule.c
 _operator _operator.c

Modules/_copy.c

@@ -1,3 +1,5 @@
+#define NEEDS_PY_IDENTIFIER
+
 #include "Python.h"
 
 /*[clinic input]
@@ -259,6 +261,7 @@ deepcopy_tuple(PyObject* x, PyObject* memo, PyObject* id_x, Py_hash_t hash_id_x)
     return y;
 }
 
+
 #define ARRAY_SIZE(a) (sizeof(a)/sizeof((a)[0]))
 
 /*

Modules/clinic/_copy.c.h

@@ -1336,10 +1336,6 @@ def detect_uuid(self):
         # Build the _uuid module if possible
         self.addext(Extension('_uuid', ['_uuidmodule.c']))
 
-    def detect_copy(self):
-        # Build the _copy module
-        self.addext(Extension('_copy', ['_copy.c']))
-
     def detect_modules(self):
         # remove dummy extension
         self.extensions = []
@@ -1350,7 +1346,6 @@ def detect_modules(self):
         self.detect_simple_extensions()
         self.detect_test_extensions()
         self.detect_readline_curses()
-        self.detect_copy()
         self.detect_crypt()
         self.detect_openssl_hashlib()
         self.detect_hash_builtins()