Mercurial > cpython-lru_cache-weakref
view Lib/test/testcodec.py @ 87690:66c1c9f32567 default tip
Add use_weakref option to functools.lru_cache
The use_weakref option makes lru_cache create weak references to the function
arguments when creating the cache key, which prevents them from staying in the
memory forever even after all other references to them are gone.
This is a proof of concept for http://bugs.python.org/issue19859
| author | Radomir Dopieralski <devel@sheep.art.pl> |
|---|---|
| date | Tue, 03 Dec 2013 16:02:48 +0100 |
| parents | 0d462d789b18 |
| children |
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""" Test Codecs (used by test_charmapcodec) Written by Marc-Andre Lemburg (mal@lemburg.com). (c) Copyright 2000 Guido van Rossum. """#" import codecs ### Codec APIs class Codec(codecs.Codec): def encode(self,input,errors='strict'): return codecs.charmap_encode(input,errors,encoding_map) def decode(self,input,errors='strict'): return codecs.charmap_decode(input,errors,decoding_map) class StreamWriter(Codec,codecs.StreamWriter): pass class StreamReader(Codec,codecs.StreamReader): pass ### encodings module API def getregentry(): return (Codec().encode,Codec().decode,StreamReader,StreamWriter) ### Decoding Map decoding_map = codecs.make_identity_dict(range(256)) decoding_map.update({ 0x78: "abc", # 1-n decoding mapping b"abc": 0x0078,# 1-n encoding mapping 0x01: None, # decoding mapping to <undefined> 0x79: "", # decoding mapping to <remove character> }) ### Encoding Map encoding_map = {} for k,v in decoding_map.items(): encoding_map[v] = k
