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"""
See documentation for the class Console defined here.
"""
import sys
import code
import traceback
import multiprocessing
from cStringIO import StringIO
class Console(code.InteractiveConsole):
"""
Console based on code.InteractiveConsole. You are supposed to run this
console in a process you create with the `multiprocessing` package.
It requires a parameter `queue_pack`, which you should create with
`make_queue_pack()` in this package. You are supposed to feed the same
queue pack into the Shell you will create for the two to be connected
to each other.
"""
def __init__(self,queue_pack,*args,**kwargs):
code.InteractiveConsole.__init__(self,*args,**kwargs)
self.input_queue, self.output_queue, \
self.runcode_finished_queue, self.runsource_return_queue = queue_pack
self.readfunc=self.input_queue.get
self.writefunc=self.output_queue.put
#self.stdin=PseudoFileIn(self.readfunc)
#self.stdout=PseudoFileOut(self.writefunc)
#self.stderr=PseudoFileErr(self.writefunc)
def raw_input(self,prompt=None):
if prompt: self.write(prompt)
return self.readfunc()
def write(self,output):
#self.log(output)
return self.writefunc(output)
def log(self,output):
print(output); sys.stdout.flush()
def push(self, command):
more = self.runsource(command, self.filename)
return more
def showsyntaxerror(self, filename=None):
type, value, sys.last_traceback = sys.exc_info()
sys.last_type = type
sys.last_value = value
if filename and type is SyntaxError:
# Work hard to stuff the correct filename in the exception
try:
msg, (dummy_filename, lineno, offset, line) = value
except:
# Not the format we expect; leave it alone
pass
else:
# Stuff in the right filename
value = SyntaxError(msg, (filename, lineno, offset, line))
sys.last_value = value
list = traceback.format_exception_only(type, value)
map(self.write, list)
def runsource(self, source, filename="<input>", symbol="single"):
try:
code = self.compile(source, filename, symbol)
except (OverflowError, SyntaxError, ValueError):
# Case 1
self.showsyntaxerror(filename)
self.runsource_return_queue.put(False)
self.runcode_finished_queue.put(None)
return False
if code is None:
# Case 2
self.runsource_return_queue.put(True)
self.runcode_finished_queue.put(None)
return True
# Case 3
self.runsource_return_queue.put(False)
#stdin, stdout, stderr = sys.stdin, sys.stdout, sys.stderr
#sys.stdin, sys.stdout, sys.stderr = self.stdin, self.stdout, self.stderr
result = StringIO()
sys.stdout = result
try:
self.runcode(code)
finally:
self.output_queue.put(result.getvalue())
sys.stdout = sys.__stdout__
# if sys.stdin==self.stdin: sys.stdin=stdin
# if sys.stdout==self.stdout: sys.stdout=stdout
# if sys.stderr==self.stderr: sys.stderr=stderr
self.runcode_finished_queue.put(None)
return False
def interact(self, banner=None):
try:
sys.ps1
except AttributeError:
sys.ps1 = ">>> "
try:
sys.ps2
except AttributeError:
sys.ps2 = "... "
cprt = 'Type "help", "copyright", "credits" or "license" for more information.'
"""
if banner is None:
self.write("Python %s on %s\n%s\n(%s)\n" %
(sys.version, sys.platform, cprt,
self.__class__.__name__))
else:
self.write("%s\n" % str(banner))
"""
more = 0
while 1:
try:
if more:
prompt = sys.ps2
else:
prompt = sys.ps1
try:
line = self.raw_input()#prompt)
# Can be None if sys.stdin was redefined
encoding = getattr(sys.stdin, "encoding", None)
if encoding and not isinstance(line, unicode):
line = line.decode(encoding)
except EOFError:
self.write("\n")
break
else:
#self.log(line.__repr__())
more = self.push(line)
except KeyboardInterrupt:
self.write("\nKeyboardInterrupt\n")
self.resetbuffer()
more = 0
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