From f35496be50c31fd07b7b9cfae8d93fc4749f879a Mon Sep 17 00:00:00 2001
From: pcain-usgs <pcain@usgs.gov>
Date: Mon, 23 Nov 2020 12:10:47 -0700
Subject: [PATCH] Get previous interval from current interval
---
geomagio/TimeseriesUtility.py | 29 +++++++++++++++++++++++++++++
1 file changed, 29 insertions(+)
diff --git a/geomagio/TimeseriesUtility.py b/geomagio/TimeseriesUtility.py
index 459287dbe..245272fe3 100644
--- a/geomagio/TimeseriesUtility.py
+++ b/geomagio/TimeseriesUtility.py
@@ -568,3 +568,32 @@ def round_usecs(time):
if rounded_usecs != usecs:
time = time.replace(microsecond=rounded_usecs)
return time
+
+
+def get_previous_interval(interval: str):
+ """Gets previous available interval from input interval.
+
+ Parameters
+ ----------
+ interval: str
+ string containing current interval
+
+ Returns
+ ----------
+ interval: str
+ string containing previous available interval
+ """
+ current_delta = get_delta_from_interval(interval)
+ if interval == "second":
+ return "tenhertz"
+
+ elif interval == "minute":
+ return "second"
+
+ elif interval in ["hour", "day"]:
+ return "minute"
+
+ else:
+ raise ValueError(
+ "Method cannot determine intervals smaller than ten hertz or larger than one minute"
+ )
--
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