Python: First test function

Question

I am attempting to make a test for a piecewise function that computes both sin(x) > 0 and sin(x) < 0

from math import sin

def f(x):
    if x > 0:
        return sin(x)
    elif x <= 0:
        return 0
    
print(f(2)) # = 0.9092974268256817
print(f(-2)) # = 0

def test_f():
    inputs = [[-2], [2]]
    answers = [0, 0.9092974268256817]
    for i in range(len(inputs)):
        computed = f(inputs[i])
        expected = answers[i]
        tolerance = 1e-10
        success = abs(computed == expected) < tolerance
        message = "Values are not matching"
        assert success, message

test_f()

I am getting error

if x > 0:
TypeError: '>' not supported between instances of 'list' and 'int'

My lack of Python skills is making me stuck. Also is my for-loop correct in the test function?

Asked By: Laxen1900

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Source

Answer 1

Your code is OK, but you’re using lists wrong to store your data. When you store data in a list, you. only need one set of brackets. Your inputs variable [[-2], [2]], but it should be [-2, 2] instead.

Answered By: Michael M.

Python: First test function

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