def _get_localzone(_root='/'):
    """Tries to find the local timezone configuration.
    
    This method prefers finding the timezone name and passing that to pytz,
    over passing in the localtime file, as in the later case the zoneinfo
    name is unknown.
    
    The parameter _root makes the function look for files like /etc/localtime
    beneath the _root directory. This is primarily used by the tests.
    In normal usage you call the function without parameters."""
    
    tzenv = os.environ.get('TZ')
    if tzenv:
        return _tz_from_env(tzenv)
    
    # Now look for distribution specific configuration files
    # that contain the timezone name.
    tzpath = os.path.join(_root, 'etc/timezone')
    if os.path.exists(tzpath):
        with open(tzpath, 'rb') as tzfile:
            data = tzfile.read()
            
            # Issue #3 was that /etc/timezone was a zoneinfo file. 
            # That's a misconfiguration, but we need to handle it gracefully:
            if data[:5] != 'TZif2':
                etctz = data.strip().decode()
                # Get rid of host definitions and comments:
                if etctz in ' ':
                    etctz, dummy = etctz.split(' ', 1)
                if '#' in etctz:
                    etctz, dummy = etctz.split('#', 1)
                return pytz.timezone(etctz.replace(' ', '_'))                

    # CentOS has a ZONE setting in /etc/sysconfig/clock,
    # OpenSUSE has a TIMEZONE setting in /etc/sysconfig/clock and
    # Gentoo has a TIMEZONE setting in /etc/conf.d/clock
    # We look through these files for a timezone:
    
    zone_re = re.compile('\s*ZONE\s*=\s*\"')
    timezone_re = re.compile('\s*TIMEZONE\s*=\s*\"')
    end_re = re.compile('\"')

    for filename in ('etc/sysconfig/clock', 'etc/conf.d/clock'):
        tzpath = os.path.join(_root, filename)
        if not os.path.exists(tzpath):
            continue
        with open(tzpath, 'rt') as tzfile:
            data = tzfile.readlines()
            
        for line in data:
            # Look for the ZONE= setting.
            match = zone_re.match(line)
            if match is None:
                # No ZONE= setting. Look for the TIMEZONE= setting.
                match = timezone_re.match(line)
            if match is not None:
                # Some setting existed
                line = line[match.end():]
                etctz = line[:end_re.search(line).start()]

                # We found a timezone
                return pytz.timezone(etctz.replace(' ', '_'))

    # No explicit setting existed. Use localtime
    for filename in ('etc/localtime', 'usr/local/etc/localtime'):
        tzpath = os.path.join(_root, filename)
        
        if not os.path.exists(tzpath):
            continue
        with open(tzpath, 'rb') as tzfile:
            return pytz.tzfile.build_tzinfo('local', tzfile)
        
    raise pytz.UnknownTimeZoneError('Can not find any timezone configuration')
dataset/ETHPy150Open wakatime/komodo-wakatime/components/wakatime/packages/tzlocal/unix.py/_get_localzone/swapped operands of `in`