not_string

Given a string, return a new string where “not “ has been added to the front. However, if the string already begins with “not”, return the string unchanged. Note: use .equals() to compare 2 strings.

not_string("candy") -> "not candy"
not_string("x") -> "not x"
not_string("not bad") -> "not bad"

This exercise was taken from codingbat.com and has been adapted for the Python language. There are many great programming exercises there, but the majority are created for Java.

Starter Code

def not_string(string: str) -> str:
    pass


result = not_string('candy')
print(result)

Tests

from main import not_string


def test_not_string_1():
    assert not_string('candy') == 'not candy'


def test_not_string_2():
    assert not_string('x') == 'not x'


def test_not_string_3():
    assert not_string('not bad') == 'not bad'


def test_not_string_4():
    assert not_string('bad') == 'not bad'


def test_not_string_5():
    assert not_string('not') == 'not'


def test_not_string_6():
    assert not_string('is not') == 'not is not'


def test_not_string_7():
    assert not_string('no') == 'not no'