Prevents crashes in some other posixmodule.c functions

The latter function is more readable, faster and doesn't raise exceptions.

Based on patch by Xiang Zhang.

The latter function is more readable, faster and doesn't raise exceptions.

would raise ImportError

non-integer numbers.  Django tests depend on this.

non-integer numbers.  Django tests depend on this.

non-integer numbers.  Django tests depend on this.

Patch by Matthieu S.

Patch by Gareth Rees.

parse_constant doesn't get called on 'null', 'true', 'false' since 3.1/2.7.

when decode astral characters.

when decode astral characters.

when decode astral characters.

(e.g. on Android).

empty compile-time PYTHONPATH components.  This fixes some tests in -S or -I
modes.

Patch by Justin Mayfield.