Convert PySerial to python 3.0

Grant Edwards grante at
Wed Feb 25 05:22:34 CET 2009

On 2009-02-25, Chris Rebert <clp2 at> wrote:
> On Tue, Feb 24, 2009 at 7:46 PM, Seth <king.seth at> wrote:
>> I am just messing around trying to get pyserial to work with 3.0.
>> I am stuck on this line:
>> if type(port) in [type(''), type(u'')]
>> how can I convert this to 3.0? I tried changing the u to a d that did
>> not do anything.
> Looks like it's doing the equivalent of the pre-3.0-ism
> `isinstance(port, basestring)`, but in a roundabout way.
> However, since basestring doesn't exist in 3.0, either:
> if isinstance(port, str):
> Or
> if isinstance(port, bytes):
> would be the appropriate replacement. Depends (obviously) on
> whether 'port' is supposed to be unicode or a byte sequence.

Port can either be an integer or a file/device name.

> Without more context, I can't really say which is what you
> want.

In the line of code in question, the conditional is inteded to
be true if "port" is someting that could be passed to the OS as
a file or device name.


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