From 60d54d8de466c179a93b6d46ad05ec1b9ba5f4a1 Mon Sep 17 00:00:00 2001
From: Frederick Muriuki Muriithi
Date: Mon, 27 Sep 2021 05:13:19 +0300
Subject: Narrow the exception and add comments

Issue:
https://github.com/genenetwork/gn-gemtext-threads/blob/main/topics/gn1-migration-to-gn2/clustering.gmi

* Only catch the `FileExistsError` allowing any other exception to pass
  through. This tries to conform a little to the review at
  https://github.com/genenetwork/genenetwork3/pull/37#discussion_r714552696
---
 gn3/computations/qtlreaper.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/gn3/computations/qtlreaper.py b/gn3/computations/qtlreaper.py
index 166d2dd..d1ff4ac 100644
--- a/gn3/computations/qtlreaper.py
+++ b/gn3/computations/qtlreaper.py
@@ -34,7 +34,8 @@ def create_output_directory(path: str):
     """Create the output directory at `path` if it does not exist."""
     try:
         os.mkdir(path)
-    except OSError:
+    except FileExistsError:
+        # If the directory already exists, do nothing.
         pass
 
 def run_reaper(
-- 
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