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Re: Python scoping

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Date Tue, 21 Jun 2011 10:55:55 +1000
Subject Re: Python scoping
From Chris Angelico <rosuav@gmail.com>
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On Tue, Jun 21, 2011 at 10:39 AM, Ben Finney <ben+python@benfinney.id.au> wrote:
> gervaz <gervaz@gmail.com> writes:
> Python doesn't have variables the way C or many other languages have
> them.
>
> Instead, Python has objects, and references to those objects so you can
> get at them. The Python documentation, much to my frustration, calls
> these references “variables” even though that gives exactly the wrong
> implication of how they'd behave.

But variable names in C and variable names in Python follow fairly
similar rules. Yes, there's the whole thing of automatic sharing and
automatic deallocation, but the name still follows rules of scoping
that are very similar - but more flexible in C.

> With the assignment statements (the statements using ‘txt = …’), the
> name ‘txt’ is bound as a reference to a value. It's not a C-like
> variable; it doesn't have a type, it doesn't need to be declared, etc.
> It's just a name, that you can bind to exactly one value any time you
> like.

It does have a type. It's a Python object. That data type can hold any
one "thing". :)

ChrisA

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Thread

Python scoping gervaz <gervaz@gmail.com> - 2011-06-20 15:35 -0700
  Re: Python scoping Chris Angelico <rosuav@gmail.com> - 2011-06-21 08:52 +1000
  Re: Python scoping Ben Finney <ben+python@benfinney.id.au> - 2011-06-21 10:39 +1000
    Re: Python scoping Chris Angelico <rosuav@gmail.com> - 2011-06-21 10:55 +1000
      Re: Python scoping Ben Finney <ben+python@benfinney.id.au> - 2011-06-21 12:38 +1000
        Re: Python scoping Chris Angelico <rosuav@gmail.com> - 2011-06-21 13:21 +1000
          Re: Python scoping Ben Finney <ben+python@benfinney.id.au> - 2011-06-21 14:06 +1000
            Re: Python scoping gervaz <gervaz@gmail.com> - 2011-06-21 02:05 -0700
  Re: Python scoping Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-06-21 00:57 +0000

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