"""Minimal "re" compatibility wrapper"""

# To help us fix any remaining bugs in the new engine, please
# report what went wrong.  You can either use the following web
# page:
#
#    http://sourceforge.net/bugs/?group_id=5470
#
# or send a mail to SRE's author:
#
#    Fredrik Lundh <effbot@telia.com>
#
# Make sure to include the pattern, the string SRE failed to
# match, and what result you expected.
#
# thanks /F
#

from sre import *
from sre import __all__

"""Minimal "re" compatibility wrapper"""

# To help us fix any remaining bugs in the new engine, please
# report what went wrong.  You can either use the following web
# page:
#
#    http://sourceforge.net/bugs/?group_id=5470
#
# or send a mail to SRE's author:
#
#    Fredrik Lundh <effbot@telia.com>
#
# Make sure to include the pattern, the string SRE failed to
# match, and what result you expected.
#
# thanks /F
#

engine = "sre" # Some apps might use this undocumented variable

from sre import *
from sre import __all__

Add 'engine' back. IDLE used this, others might have copied it from there.