Colton Sellers
15555f710d
Regression Tests / build (push) Has been cancelled
Build & Test Lean / build (push) Has been cancelled
* Use Python algorithms directly in their location; also refactor pythonpath additions to one method * Update VSCode Launch options * Drop issue these changes fixes * Use AddRange
89 lines
2.9 KiB
C#
89 lines
2.9 KiB
C#
/*
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* 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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*
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*/
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using System;
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using System.Linq;
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using Python.Runtime;
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using QuantConnect.Logging;
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using System.Collections.Generic;
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using QuantConnect.Util;
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namespace QuantConnect.Python
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{
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/// <summary>
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/// Helper class for Python initialization
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/// </summary>
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public static class PythonInitializer
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{
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// Used to allow multiple Python unit and regression tests to be run in the same test run
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private static bool _isInitialized;
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// Used to hold pending path additions before Initialize is called
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private static List<string> _pendingPathAdditions = new List<string>();
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/// <summary>
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/// Initialize the Python.NET library
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/// </summary>
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public static void Initialize()
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{
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if (!_isInitialized)
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{
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Log.Trace("PythonInitializer.Initialize(): start...");
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PythonEngine.Initialize();
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// required for multi-threading usage
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PythonEngine.BeginAllowThreads();
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_isInitialized = true;
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Log.Trace("PythonInitializer.Initialize(): ended");
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AddPythonPaths(new []{ Environment.CurrentDirectory });
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}
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}
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/// <summary>
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/// Adds directories to the python path at runtime
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/// </summary>
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public static void AddPythonPaths(IEnumerable<string> paths)
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{
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if (paths == null)
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{
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return;
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}
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if (_isInitialized)
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{
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using (Py.GIL())
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{
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_pendingPathAdditions.AddRange(paths);
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// Generate the python code to add these to our path and execute
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var code = string.Join(";", _pendingPathAdditions.Select(s => $"sys.path.append('{s}')"))
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.Replace('\\', '/');
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PythonEngine.Exec($"import sys;{code}");
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_pendingPathAdditions.Clear();
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}
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}
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else
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{
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// Add these paths to our pending additions list
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_pendingPathAdditions.AddRange(paths);
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}
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}
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}
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}
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