1 files changed, 43 insertions, 0 deletions
diff --git a/Lib/lib2to3/fixes/fix_intern.py b/Lib/lib2to3/fixes/fix_intern.py
new file mode 100644
index 0000000..6d33f8c
--- /dev/null
+++ b/Lib/lib2to3/fixes/fix_intern.py
@@ -0,0 +1,43 @@
+# Copyright 2006 Georg Brandl.
+# Licensed to PSF under a Contributor Agreement.
+
+"""Fixer for intern().
+
+intern(s) -> sys.intern(s)"""
+
+# Local imports
+from .. import pytree
+from . import basefix
+from .util import Name, Attr
+
+
+class FixIntern(basefix.BaseFix):
+
+    PATTERN = """
+    power< 'intern'
+           trailer< lpar='('
+                    ( not(arglist | argument<any '=' any>) obj=any
+                      | obj=arglist<(not argument<any '=' any>) any ','> )
+                    rpar=')' >
+           after=any*
+    >
+    """
+
+    def transform(self, node, results):
+        syms = self.syms
+        obj = results["obj"].clone()
+        if obj.type == syms.arglist:
+            newarglist = obj.clone()
+        else:
+            newarglist = pytree.Node(syms.arglist, [obj.clone()])
+        after = results["after"]
+        if after:
+            after = [n.clone() for n in after]
+        new = pytree.Node(syms.power,
+                          Attr(Name("sys"), Name("intern")) +
+                          [pytree.Node(syms.trailer,
+                                       [results["lpar"].clone(),
+                                        newarglist,
+                                        results["rpar"].clone()])] + after)
+        new.set_prefix(node.get_prefix())
+        return new