Python CodeEval boiler plate

I've been doing some CodeEval challenges. I've kept each in a small structured project. After a few, it was obvious that I needed to be able to run locally with my own test data and expected results, but be able to submit the source code unaltered. I have a folder for each challenge that contains three files. The source .py file, a small shell script and a file containing test data. This is what the boiler plate looks like ('balanced smileys' is the name of one of the challenges):

import sys

def balanced_smileys(message):
    """
    your code goes here, returning the result
    """
    
def code_eval(challenge):
    with open(sys.argv[1],'r') as filehandle:
        for line in filehandle:
            candidate_and_expected_result = [value.strip() for value in line.strip().split('| expected result =')]
            candidate = candidate_and_expected_result[0]
            expected_result = candidate_and_expected_result[1] if len(candidate_and_expected_result)>1 else None
            try:
                result = challenge(candidate)
                print(result)
                if expected_result:
                    assert str(result) == expected_result,'%s : Expected:%s, Got:%s'%(candidate,expected_result, result)
            except IndexError:
                pass 
       
code_eval(balanced_smileys)

The test data file (balanced_smileys.txt) looks like this:

:(:):)(::)(:()              | expected result = YES
:((                         | expected result = NO
i am sick today (:()        | expected result = YES
(:)                         | expected result = YES
hacker cup: started :):)    | expected result = YES
)(                          | expected result = NO

The launch script is simply this:

python balanced_smileys.py balanced_smileys.txt

When I make changes, I simply run:

sh balances_smileys.sh

This works well for most challenges and saves a bit of mucking about.