Python GIL with CPU intensive

experiment-gil-with-cpu-intensive.py

import threading

def repeatEvery(n, func, *args, **kwargs):
  def and_again():
    func(*args, **kwargs)
    t = threading.Timer(n, and_again)
    t.daemon = True
    t.start()
  t = threading.Timer(n, and_again)
  t.daemon = True
  t.start()

  
def printLog(*args, **kwargs):
  print "hello"


repeatEvery(0.5, printLog)

nums = xrange(100000000)
print -1 in nums

"""
When I run above code from OSX python 2.7.6 interpreter, it prints "hello" periodically.
But when "-1 in nums" is executed, it doesn't print anything about some secs, 
and prints False, and continues printing "hello" 
"""