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62 lines
2.3 KiB
62 lines
2.3 KiB
# Copyright (c) 2018 PaddlePaddle Authors. All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from __future__ import print_function
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import numpy as np
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def convert_to_list(value, n, name, dtype=np.int):
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"""
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Converts a single numerical type or iterable of numerical
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types into an numerical type list.
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Arguments:
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value: The value to validate and convert. Could an int, or any iterable
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of ints.
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n: The size of the list to be returned.
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name: The name of the argument being validated, e.g. "stride" or
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"filter_size". This is only used to format error messages.
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dtype: the numerical type of the element of the list to be returned.
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Returns:
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A list of n dtypes.
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Raises:
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ValueError: If something else than an int/long or iterable thereof was
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passed.
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"""
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if isinstance(value, dtype):
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return [value, ] * n
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else:
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try:
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value_list = list(value)
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except TypeError:
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raise ValueError("The " + name +
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"'s type must be list or tuple. Received: " + str(
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value))
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if len(value_list) != n:
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raise ValueError("The " + name + "'s length must be " + str(n) +
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". Received: " + str(value))
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for single_value in value_list:
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try:
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dtype(single_value)
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except (ValueError, TypeError):
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raise ValueError(
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"The " + name + "'s type must be a list or tuple of " + str(
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n) + " " + str(dtype) + " . Received: " + str(
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value) + " "
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"including element " + str(single_value) + " of type" + " "
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+ str(type(single_value)))
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return value_list
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