From fe4e6fc827e63dd1f8cdedca0b80fad59b941b43 Mon Sep 17 00:00:00 2001
From: pcain <pcain@usgs.gov>
Date: Wed, 25 Aug 2021 15:15:14 -0600
Subject: [PATCH] add empty list as default
---
geomagio/DerivedTimeseriesFactory.py | 2 --
geomagio/TimeseriesUtility.py | 2 +-
2 files changed, 1 insertion(+), 3 deletions(-)
diff --git a/geomagio/DerivedTimeseriesFactory.py b/geomagio/DerivedTimeseriesFactory.py
index 94abbe59..273b18dd 100644
--- a/geomagio/DerivedTimeseriesFactory.py
+++ b/geomagio/DerivedTimeseriesFactory.py
@@ -204,6 +204,4 @@ class DerivedTimeseriesFactory(TimeseriesFactory):
def get_missing(input: Stream, desired: List[str]) -> List[str]:
"""Return missing channels from input"""
present = TimeseriesUtility.get_channels(stream=input)
- if present is None:
- return desired
return list(set(desired).difference(set(present)))
diff --git a/geomagio/TimeseriesUtility.py b/geomagio/TimeseriesUtility.py
index e0729c21..79cc4826 100644
--- a/geomagio/TimeseriesUtility.py
+++ b/geomagio/TimeseriesUtility.py
@@ -304,7 +304,7 @@ def get_channels(stream):
channel = trace.stats.channel
if channel:
channels[channel] = True
- return [ch for ch in channels]
+ return [ch for ch in channels] or []
def get_trace_value(traces, time, default=None):
--
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