>>> from measures import proportion

>>> data = [101.4, 105.2, '*', 103.1, 103.4, '=', 101.2, 102.5]
>>> propreliable = proportion(data)
>>> round(propreliable, 3)
0.667

>>> data = [101.4, 103.5, 105.2, '*', 103.1, 103.4, 104.3, '=', 101.2, 102.5, '*', 110.2, '=', 102.3]
>>> propreliable = proportion(data)
>>> round(propreliable, 3)
0.6

>>> data = [101.4, 103.5, 105.2, '*', 103.1, 103.4, 104.3, '=', 101.2, 102.5, '*', 110.2, 102.3]
>>> propreliable = proportion(data)
>>> round(propreliable, 3)
0.5

>>> data = [101.4]
>>> propreliable = proportion(data)
>>> round(propreliable, 3)
1.0