Steemit post Bot like @wang for introduceyourself

Hello Steemit,

this is the second part of the series "how Hive account@wang is doing it"
You can read the first post here https://steemit.com/hacking/@seagul/steemit-vote-bot-like-wang-for-introduceyourself

Like i said in my first post, i will publish the post bot for the introduceyourself section

Full python code for post on every new post @introduceyourself

import time

from steemapi.steemnoderpc import SteemNodeRPC
from steembase import transactions

currentTime = int(time.time())

message = "Welcome to Steemit!"

user = "yourUserName"
wif = "yourWifKey"
category = "introduceyourself"

rpc = SteemNodeRPC("wss://steemit.com/wstmp3")
for post in rpc.stream("comment", start=currentTime):
    if post["parent_author"] == '' and post["parent_permlink"] == category:
        try:
            expiration = transactions.formatTimeFromNow(60)
            op = transactions.Comment(
                    **{"parent_author": post["author"],
                       "parent_permlink": post["permlink"],
                       "author": user,
                       "permlink": post["permlink"],
                       "title": "",
                       "body": message,
                       "json_metadata": ""}
            )
            ops = [transactions.Operation(op)]
            ref_block_num, ref_block_prefix = transactions.getBlockParams(rpc)
            tx = transactions.Signed_Transaction(
                    ref_block_num=ref_block_num,
                    ref_block_prefix=ref_block_prefix,
                    expiration=expiration,
                    operations=ops)

            tx = tx.sign([wif])
            tx = transactions.JsonObj(tx)

            rpc.broadcast_transaction(tx, api="network_broadcast")
            print("Posted!")
            print(post["title"])
        except Exception:
            print("Oops! Posting")

This script will write "Welcome to Steemit!" under each new post in the introduceyourself section.
Hive account@wang was a little bit more creative and has done a [multiline string] message. Example: http://stackoverflow.com/a/10660443