On Fri, Dec 23, 2011 at 11:09:32AM +0700, bino oetomo wrote:
> the "print self.writethis" do as told
>
> but the "self.serial.write(self.writethis)" line raise an exceptions
> ----------START-------------
> File "./mytac01.tac", line 44, in onMessage
> self.serial.write(self.writethis)
> File
> "/usr/lib/python2.6/dist-packages/twisted/internet/abstract.py", line
> 191, in write
> self._tempDataLen += len(data)
> exceptions.TypeError: object of type 'Element' has no len()
> --------------------------
It looks like "self.writethis" is an Element, not a string. Python's
print statement will automatically call str() on things before it prints
them, but Twisted's .write() methods do not. You'll have to change your
code to something like this:
self.serial.write(str(self.writethis))
Tim.
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