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-rw-r--r--examples/simple/io_write_dumpfile.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/examples/simple/io_write_dumpfile.py b/examples/simple/io_write_dumpfile.py
index ff1fd0f4..311950af 100644
--- a/examples/simple/io_write_dumpfile.py
+++ b/examples/simple/io_write_dumpfile.py
@@ -23,7 +23,7 @@ class Writer:
self.w.add(flow)
-def start():
+def start(opts):
if len(sys.argv) != 2:
raise ValueError('Usage: -s "flowriter.py filename"')
return Writer(sys.argv[1])