multithreading - Python threads not running in parallel -

currently trying have 2 threads running in parallel, seems happening first thread started 1 runs.

my code listed below, more complicated in end, example code exhibits exact same behaviour.

if start first thread first, command line repeatedly print "here", never "here2", , vice versa.

example output:

attempt handshake failed  attempt handshake failed attempt handshake failed here2 here2 here2 here2 here2 here2 here2 here2 here2 here2 here2 

and code:

import serial import time import threading multiprocessing import process datetime import datetime datetime import timedelta tableapps import *  #temporary main function def main(ttl):     s = pyserial(ttl);     count = 0;     inc = 10;     x = '';     fac = none; #changed '' singleton "none", it's coolest way check    nothingness -abe     while 1:         if(s.teensyready == false):             time.sleep(1);             print "attempt handshake failed";             s.handshake();         else:             if(fac == none):                 fac = facade(s);                 thread = threading.thread(gettouchdata(fac));                 thread2 = threading.thread(senddata(fac));                 thread2.start();                 thread.start();            if(s.teensyready == false):                 print fac.s.teensyready;                 thread.join();                 thread2.join();  def gettouchdata(fac):     while 1:         print "here2";         time.sleep(0.1); def senddata(fac):     while 1:         print "here";         time.sleep(0.1); 

thanks all!

edit: roippi able implement these threads simultaneously, after few seconds of running, 1 thread seems dominate , other doesn't appear within thread longer. in short like

here here2 here here2 here here2 here here2 here here here here here here here here here here ... 

edit 2:

ok, seemed solve follow-up issue. within while loop changed condition 'threadstarted' determine whether or not start thread. ontop of this, ran module in command line , not idle.

that being said, after incorporated rest of code, running in idle worked fine. weird.

threading.thread(gettouchdata(fac)) 

this not proper way call thread. thread needs receive callable target kwarg, , need pass args in tuple args kwarg. altogether:

threading.thread(target=gettouchdata, args=(fac,)) 

per docs:

class threading.thread(group=none, target=none, name=none, args=(), kwargs={})

this constructor should called keyword arguments. arguments are:

target callable object invoked run() method. defaults none, meaning nothing called.

args argument tuple target invocation. defaults ().