Works like PyTuple_SetItem() to build-up values in a brand new frozenset.
Also, PyFrozenSet_New() is now guaranteed to produce a distinct new frozenset.

static PyObject* variables should use PyString_InternFromString() instead of PyObject_FromString() to store a python string in a function level static var.

it's useful outside of rational numbers.

This is my first C code that had to do anything significant. Please be more
careful when looking over it.

Handle that situation where we catch socket.errors.

We might still need to close after the for loop if flushing 6! times still
doesn't cause the signal/exception.

Many of these exceptions are due to resource unavailable, so the
existing code should be able to handle many more spurious errors.

It's system dependent.  This might fix the problem with test_rfind failing.

nor UNIX is defined.  This may have caused problems on cygwin.

Raymond's advice.

which isn't as bad as it sounds.  The close() *should* raise an exception,
so if it didn't we should give more time to sync and really raise it.

Will backport.

This should make the test less flaky.  It also speeds up the test
by about 75% on my box (20+ seconds -> ~4 seconds).

doesn't cause the exception, but the close() does.

Will backport.

and not trying to connect before.

this might fix the problem.

the original code object backing the generator. Patch by Collin Winter.

as the documentation says.