From fbbc47359e3f7b59bbd5a84d85c673374933a50a Mon Sep 17 00:00:00 2001 From: Vratko Polak Date: Thu, 22 Aug 2019 15:04:34 +0200 Subject: Improve PLRsearch yet again Logic improvements for rls1908 and post-pylint fixes: + Reduce search time to 30 minutes. + Use average instead alternating loads. + Rework log/exp avg/stdev from two estimates. + Introduce and use pessimistic variance of dual trackers. + Introduce safe_exp to use when None does not skip code. + Use dot relative imports (instead of disabling pylint). + Complete docstrings for simpler functions. + Append docstrings to named tuples. + Somewhat unify docstrings related to the same arguments. + Slightly improve intentation. + State named tuples as rtype where used. + Add returns and rtype to __repr__ where missing. + Return what docstring say (or update them). + Explicit copying for vector and matrix values. Change-Id: I884c68b4839c5df5e8bef95e463666599603a0ff Signed-off-by: Vratko Polak --- resources/libraries/python/PLRsearch/log_plus.py | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-) (limited to 'resources/libraries/python/PLRsearch/log_plus.py') diff --git a/resources/libraries/python/PLRsearch/log_plus.py b/resources/libraries/python/PLRsearch/log_plus.py index 3f21cc78d7..1c802a5599 100644 --- a/resources/libraries/python/PLRsearch/log_plus.py +++ b/resources/libraries/python/PLRsearch/log_plus.py @@ -1,4 +1,4 @@ -# Copyright (c) 2018 Cisco and/or its affiliates. +# Copyright (c) 2019 Cisco and/or its affiliates. # 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: @@ -87,3 +87,16 @@ def log_minus(first, second): raise RuntimeError("log_minus: non-positive number to log") else: return first + math.log(factor) + + +def safe_exp(log_value): + """Return exponential of the argument, or zero if the argument is None. + + :param log_value: The value to exponentiate. + :type log_value: NoneType or float + :returns: The exponentiated value. + :rtype: float + """ + if log_value is None: + return 0.0 + return math.exp(log_value) -- cgit 1.2.3-korg