Or 

operand1 or operand2

If operand1 is True, the expression is True. Otherwise, the expression is True if operand2 is True and False if not.

Note that operand2 is evaluated only if operand1 is False. For example, the following evaluates to True:

  5 < 6 or func_that_loops_forever()
Herman Venter
This is Slim documentation as snarfed on 27 May 1999 by dB.