human
Solve the following python programming problem given the following code:
def create_test_environment() : 
    'Create at test environment based on $topdir/test.cfg.' 
    fname = os.path.join (topdir, 'test.cfg') 
    if (not os.access (fname, os.R_OK)) : 
        m = 'Tests need to be run from a checked out source repository.' 
        raise RuntimeError (m) 
config = configparser.ConfigParser () 
    config.read ([m]) 
    def config_var(name, default = None) : 
        try : 
            return config.get ('test', name) 
except (configparser.NoSectionError, configparser.NoOptionError) : 
            return default 
testenv.username = config_var ('username') 
    testenv.password = config_var ('password') 
    testenv.service_url = (config_var ('service_url') or RavelloClient.default_url) 
    testenv.network_blocking = config_var ('network_blocking') 
    testenv.sudo_password = config_var ('sudo_password') 
    testenv.topdir = topdir 
    testenv.testdir = testdir 

    
    

    Fix the buggy line: config.read ([m])
assistant
#Here is Python code to fix the buggy line: config.

config.read ([fname])