# Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.

# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

#

# The Universal Permissive License (UPL), Version 1.0

#

# Subject to the condition set forth below, permission is hereby granted to any

# person obtaining a copy of this software, associated documentation and/or

# data (collectively the "Software"), free of charge and under any and all

# copyright rights in the Software, and any and all patent rights owned or

# freely licensable by each licensor hereunder covering either (i) the

# unmodified Software as contributed to or provided by such licensor, or (ii)

# the Larger Works (as defined below), to deal in both

#

# (a) the Software, and

#

# (b) any piece of software and/or hardware listed in the lrgrwrks.txt file if

# one is included with the Software each a "Larger Work" to which the Software

# is contributed by such licensors),

#

# without restriction, including without limitation the rights to copy, create

# derivative works of, display, perform, and distribute the Software and make,

# use, sell, offer for sale, import, export, have made, and have sold the

# Software and the Larger Work(s), and to sublicense the foregoing rights on

# either these or other terms.

#

# This license is subject to the following condition:

#

# The above copyright notice and either this complete permission notice or at a

# minimum a reference to the UPL must be included in all copies or substantial

# portions of the Software.

#

# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE

# SOFTWARE.

def update(self, *others):

for seq in others:

if not hasattr(seq, '__iter__'):

raise TypeError("'%s' object is not iterable" % seq)

iterator = seq.__iter__()

for el in iterator:

self.add(el)

def difference(self, *others):

diff_set = self

for seq in others:

diff_set = set(el for el in diff_set if el not in set(seq))

return diff_set

def difference_update(self, *others):

for seq in others:

other_set = set(seq)

self_copy = set(self)

for el in self_copy:

if el in other_set:

self.remove(el)

def frozenset_difference(self, *others):

return frozenset(difference(self, *others))

def intersection(self, *others):

intersect_set = self

for seq in others:

intersect_set = set(el for el in intersect_set if el in set(seq))

return intersect_set

def frozenset_intersection(self, *others):

return frozenset(intersection(self, *others))

def set_repr(self):

if len(self):

s = "{"

first = True

for val in self:

if first:

first = False

else:

s += ", "

s += repr(val)

s += "}"

return s

return "set()"

def frozenset_repr(self):

if len(self):

s = "frozenset({"

first = True

for val in self:

if first:

first = False

else:

s += ", "

s += repr(val)

s += "})"

return s

return "frozenset()"

def set_copy(self):

return set(self)

def frozenset_copy(self):

return frozenset(self)

def frozenset_hash(self):

return hash(tuple(self))

set.update = update

set.difference = difference

set.difference_update = difference_update

set.intersection = intersection

set.__repr__ = set_repr

set.copy = set_copy

frozenset.difference = frozenset_difference

frozenset.intersection = frozenset_intersection

frozenset.__repr__ = frozenset_repr

frozenset.copy = frozenset_copy

frozenset.__hash__ = frozenset_hash