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8 commits

Author SHA1 Message Date
Guido van Rossum 4668b000a1 Implement PEP 238 in its (almost) full glory.
This introduces:

- A new operator // that means floor division (the kind of division
  where 1/2 is 0).

- The "future division" statement ("from __future__ import division)
  which changes the meaning of the / operator to implement "true
  division" (where 1/2 is 0.5).

- New overloadable operators __truediv__ and __floordiv__.

- New slots in the PyNumberMethods struct for true and floor division,
  new abstract APIs for them, new opcodes, and so on.

I emphasize that without the future division statement, the semantics
of / will remain unchanged until Python 3.0.

Not yet implemented are warnings (default off) when / is used with int
or long arguments.

This has been on display since 7/31 as SF patch #443474.

Flames to /dev/null.
2001-08-08 05:00:18 +00:00
Guido van Rossum b09f7ed623 Preliminary support for "from __future__ import generators" to enable
the yield statement.  I figure we have to have this in before I can
release 2.2a1 on Wednesday.

Note: test_generators is currently broken, I'm counting on Tim to fix
this.
2001-07-15 21:08:29 +00:00
Tim Peters c4889c496a Remove now-unnecessary "from __future__ import nested_scopes" stmts. 2001-07-12 22:36:02 +00:00
Ka-Ping Yee 3bda4f0878 Remove redundant "__future__:" from module docstring. 2001-03-15 10:45:44 +00:00
Tim Peters fd85a4e600 Typo repair. 2001-03-02 03:11:53 +00:00
Tim Peters d74bc432b2 Make names in __future__.py bind to class instances instead of 2-tuples.
Suggested on c.l.py by William Tanksley, and I like it.
2001-03-02 02:53:08 +00:00
Tim Peters 85ba673b0a Whitespace normalization. 2001-02-28 08:26:44 +00:00
Tim Peters ffc215a279 Add __future__.py to std library, + dull test to verify that assignments
therein are of the proper form.
2001-02-26 21:14:49 +00:00