def test_complex():
# given that complex numbers are an unordered field
# the arithmetic mean of complex numbers is meaningless
num_list = [2 + 3j, 3 + 4j, -32 - 2j]
obs = mean(num_list)
exp = NotImplemented
assert obs == exp
def test_zero():
num_list=[0,2,4,6]
obs = mean(num_list)
exp = 3
assert obs == exp
def test_ints():
num_list = [1, 2, 3, 4, 5]
obs = mean(num_list)
exp = 3
assert obs == exp
def test_long():
big = 100000000
obs = mean(range(1,big))
exp = big/2.0
assert obs == exp
def test_double():
# This one will fail in Python 2
num_list=[1,2,3,4]
obs = mean(num_list)
exp = 2.5
assert obs == exp
