From d90c675f62a6ffdb7c4f92edb23b3d2e52a7f6fa Mon Sep 17 00:00:00 2001
From: Ned Batchelder <ned@nedbatchelder.com>
Date: Sat, 4 Jan 2020 08:51:31 -0500
Subject: Ignore namespace packages in the already-imported check. #888

---
 coverage/inorout.py | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/coverage/inorout.py b/coverage/inorout.py
index d5e8b226..17e11b64 100644
--- a/coverage/inorout.py
+++ b/coverage/inorout.py
@@ -359,6 +359,10 @@ class InOrOut(object):
                 if filename in warned:
                     continue
 
+                if len(getattr(mod, "__path__", ())) > 1:
+                    # A namespace package, which confuses this code, so ignore it.
+                    continue
+
                 disp = self.should_trace(filename)
                 if disp.trace:
                     msg = "Already imported a file that will be measured: {}".format(filename)
-- 
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