SF 563203. Replaced 'has_key()' with 'in'.
diff --git a/Lib/linecache.py b/Lib/linecache.py
index 9953034..7a0859d 100644
--- a/Lib/linecache.py
+++ b/Lib/linecache.py
@@ -35,7 +35,7 @@
     """Get the lines for a file from the cache.
     Update the cache if it doesn't contain an entry for this file already."""
 
-    if cache.has_key(filename):
+    if filename in cache:
         return cache[filename][2]
     else:
         return updatecache(filename)
@@ -61,7 +61,7 @@
     If something's wrong, print a message, discard the cache entry,
     and return an empty list."""
 
-    if cache.has_key(filename):
+    if filename in cache:
         del cache[filename]
     if not filename or filename[0] + filename[-1] == '<>':
         return []