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# Copyright (C) 2006 by the Free Software Foundation, Inc.
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
# USA.
"""Provide an interactive prompt, mimicking the Python interpreter."""
import os
import sys
import code
DEFAULT_BANNER = object()
def interact(upframe=True, banner=DEFAULT_BANNER, overrides=None):
# The interactive prompt's namespace
ns = dict()
# If uplocals is true, also populate the console's locals with the locals
# of the frame that called this function (i.e. one up from here).
if upframe:
frame = sys._getframe(1)
ns.update(frame.f_globals)
ns.update(frame.f_locals)
if overrides is not None:
ns.update(overrides)
interp = code.InteractiveConsole(ns)
# Try to import the readline module, but don't worry if it's unavailable
try:
import readline
except ImportError:
pass
# Mimic the real interactive interpreter's loading of any $PYTHONSTARTUP
# file. Note that if the startup file is not prepared to be exec'd more
# than once, this could cause a problem.
startup = os.environ.get('PYTHONSTARTUP')
if startup:
try:
execfile(startup, ns)
except:
pass
# We don't want the funky console object in parentheses in the banner.
if banner is DEFAULT_BANNER:
banner = '''\
Python %s on %s
Type "help", "copyright", "credits" or "license" for more information.''' % (
sys.version, sys.platform)
elif not banner:
banner = None
interp.interact(banner)
# When an exception occurs in the InteractiveConsole, the various
# sys.exc_* attributes get set so that error handling works the same way
# there as it does in the built-in interpreter. Be anal about clearing
# any exception information before we're done.
sys.exc_clear()
sys.last_type = sys.last_value = sys.last_traceback = None
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