test_math.py

"""Math.

@see: https://docs.python.org/3/tutorial/stdlib.html#mathematics

Math module is useful as many math functions are already implemented and optimized.
"""

importmath
importrandom
importstatistics


deftest_math():
"""Math.

 The math module gives access to the underlying C library functions for floating point math.
 """
assertmath.cos(math.pi/4) ==0.70710678118654757
assertmath.log(1024, 2) ==10.0


deftest_random():
"""Random.

 The random module provides tools for making random selections.
 """

# Choose from the list randomly.
random_options= ['apple', 'pear', 'banana']
random_choice=random.choice(random_options) # i.e. 'apple'
assertrandom_choiceinrandom_options

# Sampling without replacement.
random_sample=random.sample(range(100), 10) # i.e. [30, 83, 16, 4, 8, 81, 41, 50, 18, 33]
forsampleinrandom_sample:
assert0<=sample<=100

# Choose random number.
random_float=random.random() # i.e. 0.17970987693706186
assert0<=random_float<=1

# Random integer chosen from range(6)
random_integer=random.randrange(6) # i.e. 4
assert0<=random_integer<=6


deftest_statistics():
"""Statistics.

 The statistics module calculates basic statistical properties (the mean, median,
 variance, etc.) of numeric data.
 """

data= [2.75, 1.75, 1.25, 0.25, 0.5, 1.25, 3.5]

assertstatistics.mean(data) ==1.6071428571428572
assertstatistics.median(data) ==1.25
assertstatistics.variance(data) ==1.3720238095238095