[Python-checkins] peps: PEP 418: Stephen J. Turnbull's patch 3: complete the Glossary
victor.stinner
python-checkins at python.org
Sat Apr 21 21:24:53 CEST 2012
http://hg.python.org/peps/rev/9e8299a885a5
changeset: 4293:9e8299a885a5
user: Victor Stinner <victor.stinner at gmail.com>
date: Sat Apr 21 21:25:00 2012 +0200
summary:
PEP 418: Stephen J. Turnbull's patch 3: complete the Glossary
files:
pep-0418.txt | 12 ++++++++++--
1 files changed, 10 insertions(+), 2 deletions(-)
diff --git a/pep-0418.txt b/pep-0418.txt
--- a/pep-0418.txt
+++ b/pep-0418.txt
@@ -595,6 +595,10 @@
The amount of deviation of measurements by a given instrument from
true values. See also `Accuracy and precision
<http://en.wikipedia.org/wiki/Accuracy_and_precision>`_.
+ Inaccuracy in clocks may be caused by lack of precision, drift, or an
+ incorrect initial setting of the clock (e.g., timing of threads is
+ inherently inaccurate because perfect synchronization in resetting
+ counters is quite difficult).
:Adjusted:
Resetting a clock to the correct time. This may be done either
@@ -636,7 +640,9 @@
:Drift:
The accumulated error against "true" time, as defined externally to
- the system.
+ the system. Drift may be due to imprecision, or to a difference
+ between the average rate at which clock time advances and that of
+ real time.
:Epoch:
The reference point of a clock. For clocks providing <civil time>,
@@ -662,7 +668,9 @@
:Precision:
The amount of deviation among measurements of the same physical
- value by a single instrument.
+ value by a single instrument. Imprecision in clocks may be caused by
+ a fluctuation of the rate at which clock time advances relative to
+ real time, including clock adjustment by slewing.
:Process Time:
Time elapsed since the process began. It is typically measured in
--
Repository URL: http://hg.python.org/peps
More information about the Python-checkins
mailing list