Syntax for Assert Raise [duplicate]

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• Python:How to use nose's assert_raises? 2 answers

Beginner here working on a LPTHW. I am writing a unit test and cannot figure out the syntax for "assert_raises"

For exampe in this bit of code here:

def parse_subject(word_list):
    skip(word_list, 'stop')
    next_word = peek(word_list)

    if next_word == 'noun':
        return match(word_list, 'noun')
    elif next_word == 'verb':
        return ('noun', 'player')
    else:
        raise ParserError("Expected a verb next.")

I don't know how to write a successful test for when "Expected a verb next." is returned. I've had success using assert_equals, but what is the equivalent of assert_equals for when an Error is raised. I know the function is assert_raises, but don't know the syntax. I hope this makes sense, any help would be appreiated. Thanks!