fixing codacy issues

tests/io/test_file.py

@@ -21,7 +21,7 @@ def test_file_writer_in_context(tmpdir, lines, output):
 
     context.start()
     context.recv(BEGIN, *map(Bag, lines), END)
-    for i in range(len(lines)):
+    for _ in range(len(lines)):
         context.step()
     context.stop()
 

tests/test_commands.py

@@ -18,7 +18,7 @@ def test_entrypoint():
 def test_no_command(capsys):
     with pytest.raises(SystemExit):
         entrypoint([])
-    out, err = capsys.readouterr()
+    _, err = capsys.readouterr()
     assert 'error: the following arguments are required: command' in err