def loop(self, inhibit_exceptions=False, with_backtrace=False):
"""Repeatedly read and execute commands from the user.
Arguments:
``inhibit_exceptions=True``: `boolean`
Normally, ``interact_loop`` will pass exceptions back to the caller for
handling. Setting this to ``True`` will cause an error message to
be printed, but interaction will continue.
``with_backtrace=False``: `boolean`
Whether to print a full backtrace when ``inhibit_exceptions=True``.
"""
try:
while True:
try:
if not self.once():
break
except Exception as e:
if inhibit_exceptions:
if with_backtrace:
import traceback
console.cerror(traceback.format_exc())
else:
console.cerror('error: %s' % e)
else:
raise
finally:
self.write_history()
def _cli_help(key, count):
try:
command = readline.get_line_buffer()[:cly.rlext.cursor()]
context = Interact._parser.parse(command)
if context.remaining.strip():
print()
candidates = [help[1] for help in context.help()]
text = '%s^ invalid token (candidates are %s)' % \
(' ' * (context.cursor + len(Interact.prompt)),
', '.join(candidates))
console.cerror(text)
cly.rlext.force_redisplay()
return
help = context.help()
print()
help.format(sys.stdout)
cly.rlext.force_redisplay()
return 0
except Exception as e:
Interact._dump_traceback(e)
cly.rlext.force_redisplay()
return 0
def _show_help(self, key, count):
try:
command = readline.get_line_buffer()[:self.cursor]
context = self.parser.parse(command)
if context.remaining.strip():
print
candidates = [help[1] for help in context.help()]
text = '%s^ invalid token (candidates are %s)' % \
(' ' * (context.cursor + len(self.prompt)),
', '.join(candidates))
console.cerror(text)
self._force_redisplay()
return
help = context.help()
print
console.cprint('\n'.join(help.format()))
self._force_redisplay()
return 0
except Exception, e:
Interact.dump_traceback(e)
self._force_redisplay()
return 0
def error_at_cursor(self, context, text):
"""Attempt to intelligently print an error at the current cursor
offset."""
text = str(text)
term_width = console.termwidth()
indent = ' ' * (context.cursor % term_width + len(self.prompt))
if len(indent + text) > term_width:
console.cerror(indent + '^')
console.cerror(text)
else:
console.cerror(indent + '^ ' + text)
def brief_exceptions(interact, context, completing, e):
"""Display the string summary for exceptions."""
if not completing:
console.cerror(str(e))