AlexCatarino
b2ee03ef60
Adds `is_finite`, `is_infinite` and `is_nan` methods. `decimal.Decimal` class needs to implement `is_finite` for `parse` method from `dateutil.parser`.
34 lines
1.5 KiB
Python
34 lines
1.5 KiB
Python
# QUANTCONNECT.COM - Democratizing Finance, Empowering Individuals.
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# Lean Algorithmic Trading Engine v2.0. Copyright 2014 QuantConnect Corporation.
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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 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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import math
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class Decimal(float):
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'''This is required for backwards compatibility with users performing operations over expected decimal types.
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NOTE: previously we converted C# decimal into python Decimal, but now its converted to python float due to performance.'''
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def __init__(self, obj):
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self = obj
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def is_finite(self):
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'''Return True if the argument is a finite number, and False if the argument
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is infinite or a NaN.'''
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return not self.is_infinite() and not self.is_nan()
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def is_infinite(self):
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'''Return True if the argument is either positive or negative infinity and
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False otherwise.'''
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return math.isinf(self)
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def is_nan(self):
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'''Return True if the argument is a (quiet or signaling) NaN and False
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otherwise.'''
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return math.isnan(self) |