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