split platform

lib/python3.5/lib2to3/fixes/fix_callable.py

@@ -0,0 +1,37 @@
+# Copyright 2007 Google, Inc. All Rights Reserved.
+# Licensed to PSF under a Contributor Agreement.
+
+"""Fixer for callable().
+
+This converts callable(obj) into isinstance(obj, collections.Callable), adding a
+collections import if needed."""
+
+# Local imports
+from lib2to3 import fixer_base
+from lib2to3.fixer_util import Call, Name, String, Attr, touch_import
+
+class FixCallable(fixer_base.BaseFix):
+    BM_compatible = True
+
+    order = "pre"
+
+    # Ignore callable(*args) or use of keywords.
+    # Either could be a hint that the builtin callable() is not being used.
+    PATTERN = """
+    power< 'callable'
+           trailer< lpar='('
+                    ( not(arglist | argument<any '=' any>) func=any
+                      | func=arglist<(not argument<any '=' any>) any ','> )
+                    rpar=')' >
+           after=any*
+    >
+    """
+
+    def transform(self, node, results):
+        func = results['func']
+
+        touch_import(None, 'collections', node=node)
+
+        args = [func.clone(), String(', ')]
+        args.extend(Attr(Name('collections'), Name('Callable')))
+        return Call(Name('isinstance'), args, prefix=node.prefix)