How to use the klepto.tools._b function in klepto

assert pickle(x) == string(x, 'repr')
    assert string(x) == '[1, 2, 3, \'4\', "\'5\'", ]'
    assert string(x, encoding='repr') == '[1, 2, 3, \'4\', "\'5\'", ]'
    assert string(x, encoding='utf_8') == _b('[1, 2, 3, \'4\', "\'5\'", ]')
    # some encodings 'missing' from klepto in python 3.x (due to bytes madness)
    if 'unicode' in encodings():
        assert string(x, encoding='unicode') == unicode('[1, 2, 3, \'4\', "\'5\'", ]')
    if 'zlib_codec' in encodings():
        assert string(x, encoding='zlib_codec') == 'x\x9c\x8b6\xd4Q0\xd2Q0\xd6QP7Q\xd7QPR7UW\xd2Q\xb0I*\xcd\xcc)\xd1\xcd\xccSH+\xcdK.\xc9\xcc\xcfS\xc8\xcd\xcc\xb3\x8b\x05\x00\xf6(\x0c\x9c'
    if 'hex_codec' in encodings():
        assert string(x, encoding='hex_codec') == '5b312c20322c20332c202734272c2022273527222c203c6275696c742d696e2066756e6374696f6e206d696e3e5d'

    s = stringmap()
    assert s(x) == '([1, 2, 3, \'4\', "\'5\'", ],)'
    s = stringmap(encoding='utf_8')
    assert s(x) == _b('([1, 2, 3, \'4\', "\'5\'", ],)')
    # some encodings 'missing' from klepto in python 3.x (due to bytes madness)
    if 'unicode' in encodings():
        s = stringmap(encoding='unicode')
        assert s(x) == unicode('([1, 2, 3, \'4\', "\'5\'", ],)')
    if 'zlib_codec' in encodings():
        s = stringmap(encoding='zlib_codec')
        assert s(x) == 'x\x9c\xd3\x886\xd4Q0\xd2Q0\xd6QP7Q\xd7QPR7UW\xd2Q\xb0I*\xcd\xcc)\xd1\xcd\xccSH+\xcdK.\xc9\xcc\xcfS\xc8\xcd\xcc\xb3\x8b\xd5\xd1\x04\x00\x17\x99\r\x19'
    if 'hex_codec' in encodings():
        s = stringmap(encoding='hex_codec')
        assert s(x) == '285b312c20322c20332c202734272c2022273527222c203c6275696c742d696e2066756e6374696f6e206d696e3e5d2c29'

def test_encoding():
    assert string('1') == '1'
    assert string('1', encoding='repr') == "'1'"

    x = [1,2,3,'4',"'5'", min]
    assert hash(x, 'sha1') == '3bdd73e79be4277dcb874d193b8dd08a46bc6885'
    assert pickle(x) == string(x, 'repr')
    assert string(x) == '[1, 2, 3, \'4\', "\'5\'", ]'
    assert string(x, encoding='repr') == '[1, 2, 3, \'4\', "\'5\'", ]'
    assert string(x, encoding='utf_8') == _b('[1, 2, 3, \'4\', "\'5\'", ]')
    # some encodings 'missing' from klepto in python 3.x (due to bytes madness)
    if 'unicode' in encodings():
        assert string(x, encoding='unicode') == unicode('[1, 2, 3, \'4\', "\'5\'", ]')
    if 'zlib_codec' in encodings():
        assert string(x, encoding='zlib_codec') == 'x\x9c\x8b6\xd4Q0\xd2Q0\xd6QP7Q\xd7QPR7UW\xd2Q\xb0I*\xcd\xcc)\xd1\xcd\xccSH+\xcdK.\xc9\xcc\xcfS\xc8\xcd\xcc\xb3\x8b\x05\x00\xf6(\x0c\x9c'
    if 'hex_codec' in encodings():
        assert string(x, encoding='hex_codec') == '5b312c20322c20332c202734272c2022273527222c203c6275696c742d696e2066756e6374696f6e206d696e3e5d'

    s = stringmap()
    assert s(x) == '([1, 2, 3, \'4\', "\'5\'", ],)'
    s = stringmap(encoding='utf_8')
    assert s(x) == _b('([1, 2, 3, \'4\', "\'5\'", ],)')
    # some encodings 'missing' from klepto in python 3.x (due to bytes madness)
    if 'unicode' in encodings():
        s = stringmap(encoding='unicode')
        assert s(x) == unicode('([1, 2, 3, \'4\', "\'5\'", ],)')

if memo == None: return
        filename = self.__state__['id']
        _filename = os.path.join(os.path.dirname(os.path.abspath(filename)), TEMP+hash(random(), 'md5'))
        # create a temporary file, and dump the results
        try:
            if self.__state__['serialized']:
                protocol = self.__state__['protocol']
                if type(protocol) is str: #XXX: assumes 'json'
                    pik,mode,kwd = json,'w',{}
                else: #XXX: byref=True ?
                    pik,mode,kwd = dill,'wb',{'protocol':protocol}
                with open(_filename, mode) as f:
                    pik.dump(memo, f, **kwd)
            else: #XXX: likely_import for each item in dict... ?
                from .tools import _b
                open(_filename, 'wb').write(_b('memo = %s' % repr(memo)))
        except OSError:
            "failed to populate file for %s" % str(filename)
        # move the results to the proper place
        try:
            os.remove(filename)
        except: pass
        try:
            os.renames(_filename, filename)
        except OSError:
            "error in populating %s" % str(filename)
        return
    #FIXME: missing __cmp__, __...__

pik.dump(key, f, **kwd)
            else: # try to get an import for the object
                try: memo = getimportable(value, alias='memo', byname=False)
                except AttributeError: #XXX: HACKY... get classes by name
                    memo = getimportable(value, alias='memo')
                #XXX: class instances and such fail... abuse pickle here?
                from .tools import _b
                with open(_file, 'wb') as f:
                    f.write(_b(memo))
                if input:
                    try: memo = getimportable(key, alias='memo', byname=False)
                    except AttributeError:
                        memo = getimportable(key, alias='memo')
                    from .tools import _b
                    with open(_args, 'wb') as f:
                        f.write(_b(memo))
        except OSError:
            "failed to populate directory for '%s'" % str(key)
        # move the results to the proper place
        try: #XXX: possible permissions issues here
            self._rmdir(key) #XXX: 'key' must be a suitable dir name
            os.renames(self._getdir(_key), self._getdir(key))
#       except TypeError: #XXX: catch key that isn't converted to safe filename
#           "error in populating directory for '%s'" % str(key)
        except OSError: #XXX: if rename fails, may need cleanup (_rmdir ?)
            "error in populating directory for '%s'" % str(key)

pik,mode,kwd = json,'w',{}
                    else: #XXX: byref?
                        pik,mode,kwd = dill,'wb',{'protocol':protocol}
                    with open(_file, mode) as f:
                        pik.dump(value, f, **kwd)
                    if input:
                        with open(_args, mode) as f:
                            pik.dump(key, f, **kwd)
            else: # try to get an import for the object
                try: memo = getimportable(value, alias='memo', byname=False)
                except AttributeError: #XXX: HACKY... get classes by name
                    memo = getimportable(value, alias='memo')
                #XXX: class instances and such fail... abuse pickle here?
                from .tools import _b
                with open(_file, 'wb') as f:
                    f.write(_b(memo))
                if input:
                    try: memo = getimportable(key, alias='memo', byname=False)
                    except AttributeError:
                        memo = getimportable(key, alias='memo')
                    from .tools import _b
                    with open(_args, 'wb') as f:
                        f.write(_b(memo))
        except OSError:
            "failed to populate directory for '%s'" % str(key)
        # move the results to the proper place
        try: #XXX: possible permissions issues here
            self._rmdir(key) #XXX: 'key' must be a suitable dir name
            os.renames(self._getdir(_key), self._getdir(key))
#       except TypeError: #XXX: catch key that isn't converted to safe filename
#           "error in populating directory for '%s'" % str(key)
        except OSError: #XXX: if rename fails, may need cleanup (_rmdir ?)