:data:`sys.ps2` and the hook :data:`sys.__interactivehook__` in this file.
-.. envvar:: PYTHONY2K
-
- Set this to a non-empty string to cause the :mod:`time` module to require
- dates specified as strings to include 4-digit years, otherwise 2-digit years
- are converted based on rules described in the :mod:`time` module
- documentation.
-
-
.. envvar:: PYTHONOPTIMIZE
If this is set to a non-empty string it is equivalent to specifying the
and
.I sys.ps2
in this file.
-.IP PYTHONY2K
-Set this to a non-empty string to cause the \fItime\fP module to
-require dates specified as strings to include 4-digit years, otherwise
-2-digit years are converted based on rules described in the \fItime\fP
-module documentation.
.IP PYTHONOPTIMIZE
If this is set to a non-empty string it is equivalent to specifying
the \fB\-O\fP option. If set to an integer, it is equivalent to