Hi, I am struggling to implement the equivalent of
> http://plone.org/documentation/how-to/add-charts to add
> charting capacilities to a Plone content type. The example
> uses PyChart, but I tried replacing the PyChart code with
> matplotlib code. Here it is :
agg is already configured to write to a file object rather than a
filename. Is there anything that you can use that can be converted to
a file pointer? Eg, you can pass sys.stdout to savefig, unless
sys.stdout has been hijacked, which mod_python appears to do
Also, I do not recommend using the pylab interface in a web app
server. See
http://matplotlib.sourceforge.net/faq.html#OO
If anyone else has any ideas on how to get a StringIO-like object,
which exposes the file pointer interface needed by libpng, let me
know. This is what we are currently doing in extension code
if (o.isString()) {
std::string fileName = Py::String(o);
const char *file_name = fileName.c_str();
if ((fp = fopen(file_name, "wb")) == NULL)
throw Py::RuntimeError( Printf("Could not open file %s", file_name).str() );
}
else {
if ((fp = PyFile_AsFile(o.ptr())) == NULL)
throw Py::TypeError("Could not convert object to file pointer");
fpclose = false;
}
JDH