真实场景软件工程序列数据集(含可复现环境)

markdown

Consider adding support for special numbers in almosteq()
I.e. ``nan`` is not considered close to any other value, including ``nan`. ``inf`` and ``-inf`` are only considered close to themselves.  See also [PEP 485](https://peps.python.org/pep-0485/).
Right now we have:
```pycon
>>> from mpmath import inf, mp
>>> mp.almosteq(inf, inf)
False
```
c.f.
```pycon
>>> from math import inf, isclose
>>> isclose(inf, inf)
True
```

Are there good reasons why ``almosteq()`` behave differently from the ``math.isclose()``?

pytest

collected 1 item
mpmath/tests/test_basic_ops.py F                                         [100%]
E   AssertionError: assert False
     +  where False = ae(mpf('+inf'))
     +    where ae = mpf('+inf').ae
FAILED mpmath/tests/test_basic_ops.py::test_almost_equal - AssertionError: as...
============================== 1 failed in 0.22s ===============================

pytest

collected 1 item
mpmath/tests/test_basic_ops.py .                                         [100%]
PASSED mpmath/tests/test_basic_ops.py::test_almost_equal
============================== 1 passed in 0.40s ===============================

{
  "问题": "mpmath #799",
  "修复前": {
    "exit_code": 1
  },
  "修复后": {
    "exit_code": 0
  }
}