Path: csiph.com!fu-berlin.de!uni-berlin.de!not-for-mail From: Mark Lawrence Newsgroups: comp.lang.python Subject: Re: Cannot get the value from dogpile.cache from different modules. Date: Tue, 29 Dec 2015 17:14:19 +0000 Lines: 68 Message-ID: References: <7c8df879-b03a-4323-90c5-3221dd1eced2@googlegroups.com> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit X-Trace: news.uni-berlin.de gxsgNRnzvtFC4bq8x2k+lgr74nE1neBhNzZC2+icjQvQ== Return-Path: X-Original-To: python-list@python.org Delivered-To: python-list@mail.python.org X-Spam-Status: OK 0.000 X-Spam-Evidence: '*H*': 1.00; '*S*': 0.00; '"""': 0.05; 'cache': 0.05; 'from:addr:yahoo.co.uk': 0.05; 'received:80.91': 0.09; 'received:80.91.229': 0.09; 'received:gmane.org': 0.09; 'received:list': 0.09; 'type)': 0.09; 'stored': 0.10; 'python': 0.10; 'def': 0.13; 'value.': 0.15; '(string)': 0.16; '[1].': 0.16; '[2].': 0.16; 'backend.': 0.16; 'dictionary.': 0.16; 'mailinglist': 0.16; 'modules,': 0.16; 'put.': 0.16; 'received:80.91.229.3': 0.16; 'received:io': 0.16; 'received:plane.gmane.org': 0.16; 'received:psf.io': 0.16; 'utc,': 0.16; 'wrote:': 0.16; 'skip:` 10': 0.18; 'skip:` 20': 0.18; 'variable': 0.18; 'language': 0.19; '2015': 0.20; 'lawrence': 0.22; 'file.': 0.22; 'import': 0.24; 'header:In-Reply-To:1': 0.24; 'module': 0.25; 'header:User-Agent:1': 0.26; 'example': 0.26; 'header:X-Complaints-To:1': 0.26; '[2]': 0.27; 'subject:skip:d 10': 0.27; 'idea': 0.28; 'values': 0.28; 'dictionary': 0.29; 'end,': 0.29; 'value)': 0.29; 'code': 0.30; 'december': 0.32; '[1]': 0.32; 'language.': 0.32; 'returned': 0.32; 'class': 0.33; 'file': 0.34; 'saved': 0.35; 'but': 0.36; 'should': 0.36; 'there': 0.36; 'url:org': 0.36; 'skip:m 40': 0.36; 'to:addr:python-list': 0.36; 'subject:: ': 0.37; 'method': 0.37; 'received:org': 0.37; 'files': 0.38; 'why': 0.39; 'data': 0.39; 'subject:from': 0.39; 'subject:the': 0.39; 'to:addr:python.org': 0.40; 'where': 0.40; 'mark': 0.40; 'save': 0.60; 'show': 0.62; 'charset:windows-1252': 0.62; 'different': 0.63; 'our': 0.64; 'accessed': 0.66; 'here': 0.66; 'subject:get': 0.81; 'pythonistas,': 0.84; 'subject:value': 0.84 X-Injected-Via-Gmane: http://gmane.org/ X-Gmane-NNTP-Posting-Host: ip13.worldwideprinting.adsl.gxn.net User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:38.0) Gecko/20100101 Thunderbird/38.4.0 In-Reply-To: X-BeenThere: python-list@python.org X-Mailman-Version: 2.1.20+ Precedence: list List-Id: General discussion list for the Python programming language List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Xref: csiph.com comp.lang.python:100960 On 29/12/2015 15:20, xeon Mailinglist wrote: > On Tuesday, December 29, 2015 at 11:16:10 AM UTC, xeon Mailinglist wrote: >> 1. How do I create a global variable that can be accessed by all classes? >> >> 2. I am using `dogpile.cache` to store data in the cache [1], but if I set and get the same key from different modules, I don't get the value. Here is an example in [2]. The value than I get is `NO_VALUE.NO_VALUE`. Why this happens? >> >> setter is the setter.py >> getter is the getter.py >> Memoize is the file in [1]. >> >> >> [1] my dogpile class `Memoize.py` >> >> from dogpile.cache import make_region >> >> region = make_region().configure('dogpile.cache.memory') >> >> def save(key, value): >> """ >> general purpose method to save data (value) in the cache >> >> :param key (string) key of the value to be saved in cache >> :param value (any type) the value to be saved >> """ >> region.set(key, value) >> >> >> def get(key): >> """ >> general purpose method to get data from the cache >> >> :param key (string) key of the data to be fetched >> :return value (any type) data to be returned from the cache >> """ >> return region.get(key) >> >> >> [2] My python example >> >> `setter.py` >> >> def myset(value): >> Memoize.save("myvalue", value) >> >> `getter.py` >> >> def myget(): >> return Memoize.get("myvalue") <- this value is NO_VALUE. NO_VALUE >> >> My class: >> >> setter.myset(123) >> getter.myget() > > The idea that I get from dogpile, is that in each module (getter.py, or setter.py) there is a dictionary where the values are stored in the backend. Hence, getter.py has its dictionary and setter.py has its dictionary also. In the end, there is not a single dictionary where all the values should be put. And I want a single dictionary. > Then put everything in one file. Three files for the amount of code you show above is nonsensical. You might like to read http://dirtsimple.org/2004/12/python-is-not-java.html and in response to that http://dirtsimple.org/2004/12/java-is-not-python-either.html -- My fellow Pythonistas, ask not what our language can do for you, ask what you can do for our language. Mark Lawrence