[reportlab-users] io.StringIO vs cStringIO.StringIO

[Michael Hipp]

It appears the 'cStringIO' module is being depreciated in favor of the 'io' 
module going forward to Py3.

In Py2.7, this works:
   from cStringIO import StringIO
   out = StringIO()  # write it to a memory buffer
   doc = SimpleDocTemplate(out, ...)

But this doesn't:
   from io import StringIO
   ...

I thought the io.StringIO was a drop-in replacement, but it gives this exception:

TypeError: string argument expected, got 'str'
...
File "C:\Python27\Lib\site-packages\reportlab\pdfbase\pdfdoc.py", line 235, in 
SaveToFile
   f.write(self.GetPDFData(canvas))

The thing returned by self.GetPDFData(canvas) is indeed of type 'str' but the 
io.StringIO object doesn't seem to like it. Any ideas?

Reportlab 2.5, Win7x32, Py2.7.

Thanks,
Michael Hipp