From 2aa698f3aee879ce4f9244e830579cc6b6c2faa8 Mon Sep 17 00:00:00 2001
From: Bruce Flynn <brucef@ssec.wisc.edu>
Date: Thu, 3 Jan 2019 13:45:22 -0600
Subject: [PATCH] lazy load grain
---
edosl0util/timecode.py | 22 +++++++++++++++++-----
1 file changed, 17 insertions(+), 5 deletions(-)
diff --git a/edosl0util/timecode.py b/edosl0util/timecode.py
index d6160fd..26b4aef 100644
--- a/edosl0util/timecode.py
+++ b/edosl0util/timecode.py
@@ -8,8 +8,6 @@ __copyright__ = "Copyright (C) 2015 University of Wisconsin SSEC. All rights res
UNIX_EPOCH = datetime(1970, 1, 1)
CDS_EPOCH = datetime(1958, 1, 1)
-_grain = Grain()
-
def unixtime(dt):
"""
@@ -29,7 +27,7 @@ def timecode_parts_to_iet(days, ms, us, epoch):
"""
Convert components to a IET based on arbitrary epoch.
"""
- return int(_grain.utc2tai(
+ return int(_get_grain().utc2tai(
epoch + timedelta(days=float(days),
milliseconds=float(ms),
microseconds=float(us)),
@@ -58,5 +56,19 @@ def dt_to_cds(dt):
return (d.days, int(d.seconds * 1e3), d.microseconds)
-dt_to_iet = _grain.utc2iet
-iet_to_dt = _grain.iet2utc
+_grain = None
+
+
+def _get_grain():
+ global _grain
+ if _grain is None:
+ _grain = Grain()
+ return _grain
+
+
+def dt_to_iet(*args, **kwargs):
+ return _get_grain().utc2iet(*args, **kwargs)
+
+
+def iet_to_dt(*args, **kwargs):
+ return _get_grain().iet2utc(*args, **kwargs)
--
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