Initial addition of Python scripts

utils.py

@@ -0,0 +1,140 @@
+
+def any(things):
+	"""Return True if any of the things are True.
+
+	things should be iterable.
+
+	If the things are empty, then we can't say any are True
+	>>> any([])
+	False
+
+	If all the things are False, then we can't say any are True
+	>>> any([False,False,False])
+	False
+
+	If all the things are equivalent to False, then we can't say any are True
+	>>> any([0,[],''])
+	False
+
+	The type of the true thing should not matter
+	>>> any([1,[],''])
+	True
+	>>> any([0,(2,),''])
+	True
+	>>> any([0,[],'foo'])
+	True
+	>>> any([0,[],True,''])
+	True
+
+	It should not matter where the True thing is
+	>>> any((True,False,False,False,False,))
+	True
+	>>> any((False,False,True,False,False,))
+	True
+	>>> any((False,False,False,False,True,))
+	True
+
+	The size of the sequence should not matter
+	>>> True == any((True,)) == any((True,True,)) == any((True,True,True,True,))
+	True
+
+	Any string is True
+	>>> any('foo')
+	True
+
+	Except an empty string
+	>>> any('')
+	False
+
+	The function cannot be applied to ints
+	>>> any(7)
+	Traceback (most recent call last):
+	    ...
+	TypeError: iteration over non-sequence
+	"""
+	for thing in things:
+		if thing:
+			return True
+	return False
+
+def all(things):
+	"""Return True if all of the things are True.
+
+	things should be iterable.
+
+	If the things are empty, then we can't say all are True
+	>>> all([])
+	False
+
+	If all the things are False, then we can't say all are True
+	>>> all([False,False,False])
+	False
+
+	If all the things are equivalent to False, then we can't say all are True
+	>>> all([0,[],''])
+	False
+
+	The type of the false thing should not matter
+	>>> all([0,True,True,])
+	False
+	>>> all([True,(),True,])
+	False
+	>>> all([True,True,'',])
+	False
+
+	Position of the false thing should not matter
+	>>> all((False,True,True,))
+	False
+	>>> all((True,False,True,))
+	False
+	>>> all((True,True,False,))
+	False
+
+	any string is True
+	>>> all('foo')
+	True
+
+	Except an empty string
+	>>> all('')
+	False
+
+	The function cannot be applied to ints
+	>>> all(7)
+	Traceback (most recent call last):
+	    ...
+	TypeError: iteration over non-sequence
+	"""
+	for thing in things:
+		if not thing:
+			return False
+	return len(things) > 0
+
+import logging
+
+seed = 999.0
+count = 0
+testably_random = True
+def random():
+	global testably_random
+	if testably_random:
+		from random import random
+		return random()
+	global seed
+	global count
+	seed += 1.0
+	count += 1
+	if seed > 1999:
+		seed = 0.0
+	logging.info("count: %d" % count)
+	#if seed == 998:
+	#	sys.exit(1)
+	return seed / 2000.0
+
+def choice(aList):
+	i = int(random() * len(aList))
+	return aList[i]
+
+if __name__ == '__main__':
+	import doctest
+	doctest.testmod()
+