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# Copyright 2000-2010 Michael Hudson-Doyle <micahel@gmail.com>
# Armin Rigo
#
# All Rights Reserved
#
#
# Permission to use, copy, modify, and distribute this software and
# its documentation for any purpose is hereby granted without fee,
# provided that the above copyright notice appear in all copies and
# that both that copyright notice and this permission notice appear in
# supporting documentation.
#
# THE AUTHOR MICHAEL HUDSON DISCLAIMS ALL WARRANTIES WITH REGARD TO
# THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
# AND FITNESS, IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL,
# INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
# RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
# CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
# CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
"""This is an alternative to python_reader which tries to emulate
the CPython prompt as closely as possible, with the exception of
allowing multiline input and multiline history entries.
"""
import sys
from pyrepl.readline import multiline_input, _error, _get_reader
def check(): # returns False if there is a problem initializing the state
try:
_get_reader()
except _error:
return False
return True
def _strip_final_indent(text):
# kill spaces and tabs at the end, but only if they follow '\n'.
# meant to remove the auto-indentation only (although it would of
# course also remove explicitly-added indentation).
short = text.rstrip(' \t')
n = len(short)
if n > 0 and text[n-1] == '\n':
return short
return text
def run_multiline_interactive_console(mainmodule=None, future_flags=0):
import code
import __main__
mainmodule = mainmodule or __main__
console = code.InteractiveConsole(mainmodule.__dict__, filename='<stdin>')
if future_flags:
console.compile.compiler.flags |= future_flags
def more_lines(unicodetext):
# ooh, look at the hack:
if sys.version_info < (3,):
src = "#coding:utf-8\n"+_strip_final_indent(unicodetext).encode('utf-8')
else:
src = _strip_final_indent(unicodetext)
try:
code = console.compile(src, '<stdin>', 'single')
except (OverflowError, SyntaxError, ValueError):
return False
else:
return code is None
while 1:
try:
try:
sys.stdout.flush()
except:
pass
ps1 = getattr(sys, 'ps1', '>>> ')
ps2 = getattr(sys, 'ps2', '... ')
try:
statement = multiline_input(more_lines, ps1, ps2,
returns_unicode=True)
except EOFError:
break
more = console.push(_strip_final_indent(statement))
assert not more
except KeyboardInterrupt:
console.write("\nKeyboardInterrupt\n")
console.resetbuffer()
except MemoryError:
console.write("\nMemoryError\n")
console.resetbuffer()
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