flying-sheep edited this page Jan 18, 2012 · 4 revisions

I’m currently working on PyRepl. Since many of my project never see the light of the day, i present you the approach and skeleton of it: The finished project would have many convenience functions built around the js function.

import sys, re
from telnetlib import Telnet

class Mozrepl(object):
	def __init__(self, ip="", port=4242):
		self.ip = ip
		self.port = port
		self.prompt = b"repl>"
	def __enter__(self):
		self.t = Telnet(self.ip, self.port)
		intro = self.t.read_until(self.prompt, 1)
		if not intro.endswith(self.prompt):
			self.prompt ="repl\d+>", intro).group(0)
			print("Waited due to nonstandard prompt:", self.prompt.decode())
		return self
	def __exit__(self, type, value, traceback):
		del self.t
	def js(self, command):
		self.t.write(command.encode() + b"\n")
		return self.t.read_until(self.prompt).decode()


You can use the with statement to create a telnet connection like this:

with Mozrepl() as mozrepl:

alternatively, use the connection machanism manually:

mozrepl = Mozrepl().__enter__()




  • create new telnet sessions via __enter__ and __exit__ that can be used in parallel
  • expose repl’s functions in the Mozrepl class by parsing the output of inspect and doc
You can’t perform that action at this time.
You signed in with another tab or window. Reload to refresh your session. You signed out in another tab or window. Reload to refresh your session.
Press h to open a hovercard with more details.