def from_file(f, origin = None, rdclass = dns.rdataclass.IN,
              relativize = True, zone_factory=Zone, filename=None,
              allow_include=True, check_origin=True):
    """Read a master file and build a zone object.

    @param f: file or string.  If I{f} is a string, it is treated
    as the name of a file to open.
    @param origin: The origin of the zone; if not specified, the first
    $ORIGIN statement in the master file will determine the origin of the
    zone.
    @type origin: dns.name.Name object or string
    @param rdclass: The zone's rdata class; the default is class IN.
    @type rdclass: int
    @param relativize: should names be relativized?  The default is True
    @type relativize: bool
    @param zone_factory: The zone factory to use
    @type zone_factory: function returning a Zone
    @param filename: The filename to emit when describing where an error
    occurred; the default is '<file>', or the value of I{f} if I{f} is a
    string.
    @type filename: string
    @param allow_include: is $INCLUDE allowed?
    @type allow_include: bool
    @param check_origin: should sanity checks of the origin node be done?
    The default is True.
    @type check_origin: bool
    @raises dns.zone.NoSOA: No SOA RR was found at the zone origin
    @raises dns.zone.NoNS: No NS RRset was found at the zone origin
    @rtype: dns.zone.Zone object
    """

    if 0x02030000 >= sys.hexversion:
        # allow Unicode filenames; turn on universal newline support
        str_type = basestring
        opts = 'rU'
    else:
        str_type = str
        opts = 'r'
    if isinstance(f, str_type):
        if filename is None:
            filename = f
        f = file(f, opts)
        want_close = True
    else:
        if filename is None:
            filename = '<file>'
        want_close = False

    try:
        z = from_text(f, origin, rdclass, relativize, zone_factory,
                      filename, allow_include, check_origin)
    finally:
        if want_close:
            f.close()
    return z
dataset/ETHPy150Open catap/namebench/nb_third_party/dns/zone.py/from_file/swapped operands of `>=`