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Re: Understanding Python from a PHP coder's perspective

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From Tim Chase <python.list@tim.thechases.com>
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Subject Re: Understanding Python from a PHP coder's perspective
Date Mon, 7 Dec 2015 21:11:14 -0600
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On 2015-12-08 10:09, Chris Angelico wrote:
> All three are very different.
> 
> 1) Process state.
> 
> You start up a Python program, and it sits there waiting for a
> request. You give it a request, and get back a response; it goes
> back to waiting for a request. If you change a global variable, or
> maintain persistent state, or anything, the next request will 'see'
> that change. This is completely global.

1) This is completely global *to the process* (you can have multiple
Python processes sitting around waiting, taking advantage of multiple
cores)

2) This is almost always a bad idea for multiple reasons (it can get
in the way of scaling, it can produce hard-to-track-down bugs, etc).
Use a real session store (a database, a key/value store like
memcached, a NoSQL store like Redis, store session info in cookies,
etc.) instead.

-tkc

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Thread

Understanding Python from a PHP coder's perspective villascape@gmail.com - 2015-12-07 13:07 -0800
  Re: Understanding Python from a PHP coder's perspective villascape@gmail.com - 2015-12-07 13:21 -0800
    Re: Understanding Python from a PHP coder's perspective Chris Angelico <rosuav@gmail.com> - 2015-12-08 09:00 +1100
      Re: Understanding Python from a PHP coder's perspective villascape@gmail.com - 2015-12-07 14:27 -0800
        Re: Understanding Python from a PHP coder's perspective Chris Angelico <rosuav@gmail.com> - 2015-12-08 10:09 +1100
          Re: Understanding Python from a PHP coder's perspective villascape@gmail.com - 2015-12-07 17:00 -0800
            Re: Understanding Python from a PHP coder's perspective Chris Angelico <rosuav@gmail.com> - 2015-12-08 14:26 +1100
        Re: Understanding Python from a PHP coder's perspective Ian Kelly <ian.g.kelly@gmail.com> - 2015-12-07 16:10 -0700
        Re: Understanding Python from a PHP coder's perspective Cameron Simpson <cs@zip.com.au> - 2015-12-08 10:07 +1100
        Re: Understanding Python from a PHP coder's perspective Tim Chase <python.list@tim.thechases.com> - 2015-12-07 21:11 -0600
        Re: Understanding Python from a PHP coder's perspective Chris Angelico <rosuav@gmail.com> - 2015-12-08 14:47 +1100
  Re: Understanding Python from a PHP coder's perspective Cameron Simpson <cs@zip.com.au> - 2015-12-08 08:33 +1100
  Re: Understanding Python from a PHP coder's perspective Ian Kelly <ian.g.kelly@gmail.com> - 2015-12-07 14:37 -0700
  Re: Understanding Python from a PHP coder's perspective Chris Angelico <rosuav@gmail.com> - 2015-12-08 08:40 +1100
  Re: Understanding Python from a PHP coder's perspective Terry Reedy <tjreedy@udel.edu> - 2015-12-07 16:53 -0500
  Re: Understanding Python from a PHP coder's perspective Ian Kelly <ian.g.kelly@gmail.com> - 2015-12-07 14:59 -0700
  Re: Understanding Python from a PHP coder's perspective Chris Angelico <rosuav@gmail.com> - 2015-12-08 09:03 +1100
  Re: Understanding Python from a PHP coder's perspective Tim Chase <python.list@tim.thechases.com> - 2015-12-07 16:28 -0600
  Re: Understanding Python from a PHP coder's perspective villascape@gmail.com - 2015-12-07 20:11 -0800
  Re: Understanding Python from a PHP coder's perspective Peter Otten <__peter__@web.de> - 2015-12-08 10:24 +0100
  Re: Understanding Python from a PHP coder's perspective Chris Angelico <rosuav@gmail.com> - 2015-12-08 20:40 +1100

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