CODEWITHSUNDEEP
pythonsockets
aceminer
aceminer

Reputation: 4295

select.select in python need 1 - 3 arguments sequence

I keep on receiving this error of 1 - 3 arguments needing to be sequences

import socket               # Import socket module
import sys 
import select

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)        # Create a socket object
host = "127.0.0.1" # Get local machine name
port = 50001               # Reserve a port for your service.
s.bind((host, port))        # Bind to the port

a = []
b = []

s.listen(1)                 # Now wait for client connection.
c, addr = s.accept()     # Establish connection with client.

s.setblocking(0)

ready = select.select(s, s, s, 1)  # i believe the error lies in here 
while True:
   print "reached"
   if ready[0]:
      print "reached1"
      data = mysocket.recv(4096)
   print 'Got connection from', addr
   c.send('Thank you for connecting \r\n') #all strings have to end with /r/n!!!
   print "sent"
c.close()                # Close the connection

Error

Select.select arguments 1 - 3 has to be sequences.

I am new to python and hence i am unsure of what the error is. I googled the select code from another post as i wanted my recv socket to be non blocking

Upvotes: 1

Views: 3335

Answers (1)

mata
mata

Reputation: 69062

select.select takes three lists as arguments, rlist, wlist and xlist:

  • rlist: wait until ready for reading
  • wlist: wait until ready for writing
  • xlist: wait for an “exceptional condition” (see the manual page for what your system considers such a condition)

You're not passing lists but single sockets.

Try this:

ready = select.select([s], [s], [s], 1)

The return value will, again, be a tuple of three lists, the first containig sockets ready for reading, the second sockets ready for writing and the third sockets in 'exceptional condition'.

Note also that in your while loop you never update ready, so you will always use the same lists of sockets. Also, you should have a break somewhere, otherwise you'll end up calling c.send in an endless loop.

Upvotes: 4

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