From 7f2856b8c3778af4f6769bc4a155f49a3a2b98e7 Mon Sep 17 00:00:00 2001
From: ophiry <ophir@hiredscore.com>
Date: Wed, 14 Oct 2015 08:45:45 +0300
Subject: [PATCH] support mutable parameters

---
 pyfscache/fscache.py | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/pyfscache/fscache.py b/pyfscache/fscache.py
index 610c3bf..a7249cc 100755
--- a/pyfscache/fscache.py
+++ b/pyfscache/fscache.py
@@ -6,6 +6,7 @@
 import time
 import base64
 import inspect
+import copy
 
 __all__ = ["CacheError", "FSCache", "make_digest",
            "auto_cache_function", "cache_function", "to_seconds"]
@@ -425,7 +426,7 @@ def auto_cache_function(f, cache):
   except (AttributeError, TypeError):
     fid = (f.__name__, repr(type(f)))
   def _f(*args, **kwargs):
-    k = (fid, args, kwargs)
+    k = copy.deepcopy((fid, args, kwargs))
     if k in cache:
       result = cache[k]
     else:
@@ -447,7 +448,7 @@ def cache_function(f, keyer, cache):
   It is best to have a unique `keyer` for every function.
   """
   def _f(*args, **kwargs):
-    k = keyer(*args, **kwargs)
+    k = copy.deepcopy(keyer(*args, **kwargs))
     if k in cache:
       result = cache[k]
     else: