device: check for existences of keys file before opening
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@ -1525,6 +1525,7 @@ KEYCODES = _NamedInts(
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# load in override dictionary for KEYCODES
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try:
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if _os.path.isfile(_keys_file_path):
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with open(_keys_file_path) as keys_file:
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keys = _yaml.safe_load(keys_file)
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if isinstance(keys, dict):
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