diff options
| -rw-r--r-- | serial/serialutil.py | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/serial/serialutil.py b/serial/serialutil.py index 2cce816..0ba0563 100644 --- a/serial/serialutil.py +++ b/serial/serialutil.py @@ -559,7 +559,7 @@ class SerialBase(io.RawIOBase): # context manager def __enter__(self): - if not self.is_open: + if self.port and not self.is_open: self.open() return self |