human
Solve the following python programming problem given the following code:
def default_platform_name() : 
    'Guess a sane default platform name.

    On OS X and Windows, just uses the default platform name. On Linux, uses
    information from the `platform` module to try to make something reasonable.
    ' 
    def sanitize(string) : 
        return re.sub ('[^a-z0-9_]', '_', string.lower ()) 
def grab_version(string, num) : 
        "Grab the `num` most significant components of a version string.

        >>> grab_version('12.04.1', 2)
        '12.04'
        >>> grab_version('8.2', 1)
        '8'
        " 
        return '.'.join (string.split ('.') [: num]) 
if (platform.system () == 'Linux') : 
        (dist, version, __) = platform.linux_distribution () 
        dist = re.sub ('linux$', '', dist.lower ()).strip () 
        if (dist == 'red hat enterprise linux server') : 
            dist = 'rhel' 
release = None 
        if (dist in ['debian', 'rhel', 'centos', 'fedora', 'opensuse']) : 
            release = grab_version (version, 1) 
else : 
            if (dist in ['ubuntu']) : 
                release = grab_version (version, 2) 
if release : 
            return 'linux_{dist}_{release}_{arch}'.format (dist = sanitize (dist), release = sanitize (grab_version), arch = sanitize (platform.machine ())) 
return distlib.wheel.ARCH 

    
    

    Fix the buggy line: return 'linux_{dist}_{release}_{arch}'.format (dist = sanitize (dist), release = sanitize (grab_version), arch = sanitize (platform.machine ()))
assistant
#Here is Python code to fix the buggy line: return 'linux_{dist}_{release}_{arch}'.

return 'linux_{dist}_{release}_{arch}'.format (dist = sanitize (dist), release = sanitize (release), arch = sanitize (platform.machine ()))