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POPython-Reportlab error: ValueError: format not resolved
 

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    <p>when I was using python-reportlab to create a pdf document, sometimes it throws out an exception: <code>ValueError: format not resolved talk.google.com</code>, I wonder why this came out, and how to solve it, the full error stack is like below:</p> <pre><code>File "/usr/lib64/python2.7/threading.py", line 552, in __bootstrap_inner self.run() File "/usr/lib64/python2.7/threading.py", line 505, in run self.__target(*self.__args, **self.__kwargs) File "/usr/lib/python2.7/site-packages/tweets2pdf/tweets2pdf.py", line 42, in generate_thread tpdoc.dump() File "/usr/lib/python2.7/site-packages/tweets2pdf/pdfgen.py", line 609, in dump self.pdfdoc.build(self.elements, onFirstPage = self.on_first_page, onLaterPages = self.on_later_pages) File "/usr/lib64/python2.7/site- packages/reportlab/platypus/doctemplate.py", line 1117, in build BaseDocTemplate.build(self,flowables, canvasmaker=canvasmaker) File "/usr/lib64/python2.7/site- packages/reportlab/platypus/doctemplate.py", line 906, in build self._endBuild() File "/usr/lib64/python2.7/site- packages/reportlab/platypus/doctemplate.py", line 848, in _endBuild if getattr(self,'_doSave',1): self.canv.save() File "/usr/lib64/python2.7/site-packages/reportlab/pdfgen/canvas.py", line 1123, in save self._doc.SaveToFile(self._filename, self) File "/usr/lib64/python2.7/site-packages/reportlab/pdfbase/pdfdoc.py", line 235, in SaveToFile f.write(self.GetPDFData(canvas)) File "/usr/lib64/python2.7/site-packages/reportlab/pdfbase/pdfdoc.py", line 257, in GetPDFData return self.format() File "/usr/lib64/python2.7/site-packages/reportlab/pdfbase/pdfdoc.py", line 417, in format IOf = IO.format(self) File "/usr/lib64/python2.7/site-packages/reportlab/pdfbase/pdfdoc.py", line 869, in format fcontent = format(self.content, document, toplevel=1) # yes this is at top level File "/usr/lib64/python2.7/site-packages/reportlab/pdfbase/pdfdoc.py", line 102, in format f = element.format(document) File "/usr/lib64/python2.7/site-packages/reportlab/pdfbase/pdfdoc.py", line 1635, in format return D.format(document) File "/usr/lib64/python2.7/site-packages/reportlab/pdfbase/pdfdoc.py", line 667, in format L = [(format(PDFName(k),document)+" "+format(dict[k],document)) for k in keys] File "/usr/lib64/python2.7/site-packages/reportlab/pdfbase/pdfdoc.py", line 102, in format f = element.format(document) File "/usr/lib64/python2.7/site-packages/reportlab/pdfbase/pdfdoc.py", line 1764, in format if f is None: raise ValueError, "format not resolved %s" % self.name ValueError: format not resolved talk.google.com </code></pre>
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    1. COWhat data did you pass to reportlab library?
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    2. COI've solved this problem, when I gave an link without the protocol prefix to the element, such as <a href="stackoverflow.com">s</a>, it throw out this exception, but when I added "http://" to the link url, it works.
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