You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
80 lines
2.1 KiB
80 lines
2.1 KiB
# Copyright (c) 2018 PaddlePaddle Authors. All Rights Reserved.
|
|
#
|
|
# Licensed under the Apache License, Version 2.0 (the "License");
|
|
# you may not use this file except in compliance with the License.
|
|
# You may obtain a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS,
|
|
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
# See the License for the specific language governing permissions and
|
|
# limitations under the License.
|
|
|
|
from __future__ import print_function
|
|
|
|
import collections
|
|
from .wrapped_decorator import signature_safe_contextmanager
|
|
import six
|
|
import sys
|
|
|
|
__all__ = ['generate', 'switch', 'guard']
|
|
|
|
|
|
class UniqueNameGenerator(object):
|
|
"""
|
|
Generate unique name with prefix.
|
|
|
|
Args:
|
|
prefix(str): The generated name prefix. All generated name will be
|
|
started with this prefix.
|
|
"""
|
|
|
|
def __init__(self, prefix=None):
|
|
self.ids = collections.defaultdict(int)
|
|
if prefix is None:
|
|
prefix = ""
|
|
self.prefix = prefix
|
|
|
|
def __call__(self, key):
|
|
"""
|
|
Generate unique names with prefix
|
|
|
|
Args:
|
|
key(str): The key of return string.
|
|
|
|
Returns(str): A unique string with the prefix
|
|
"""
|
|
tmp = self.ids[key]
|
|
self.ids[key] += 1
|
|
return self.prefix + "_".join([key, str(tmp)])
|
|
|
|
|
|
generator = UniqueNameGenerator()
|
|
|
|
|
|
def generate(key):
|
|
return generator(key)
|
|
|
|
|
|
def switch(new_generator=None):
|
|
global generator
|
|
old = generator
|
|
if new_generator is None:
|
|
generator = UniqueNameGenerator()
|
|
else:
|
|
generator = new_generator
|
|
return old
|
|
|
|
|
|
@signature_safe_contextmanager
|
|
def guard(new_generator=None):
|
|
if isinstance(new_generator, six.string_types):
|
|
new_generator = UniqueNameGenerator(new_generator)
|
|
elif isinstance(new_generator, six.binary_type):
|
|
new_generator = UniqueNameGenerator(new_generator.decode())
|
|
old = switch(new_generator)
|
|
yield
|
|
switch(old)
|