Kivy and matplotlib? - python-2.7

Question

I just wanted to know if matplotlib is compatible with kivy 1.9.0, and how I do I go about implementing it if it's possible? If it's isn't supported, does kivy have something very similar to it?
I want to able use this particular code from one my programs in my kivy app:
def printPieChart(table, column):
if column == 6:
columnList = table.iloc[:, -1:].values.T.ravel()
else:
columnList = table.iloc[:, (column - 7): (column - 6)].values.T.ravel()
countedList = Counter(columnList)
#set up the size of the pie chart
fig = plt.figure(figsize=[10, 10])
ax = fig.add_subplot(111)
cmap = plt.cm.prism
#input variables for pie function
slices = [float(v) for v in countedList.values()]
colors = cmap(np.linspace(0., 1., len(slices)))
labels = [float(k) for k in countedList]
columnHeaders = list(table.columns.values)
#the pie chart
pie_wedge_collection = ax.pie(slices, colors = colors, labels = labels, labeldistance = 1.05, autopct = '%1.1f%%')
#get rid of the black outlines between the wedges and around the pie
for pie_wedge in pie_wedge_collection[0]:
pie_wedge.set_edgecolor('white')
ax.set_title(columnHeaders[column + 1])
If I wanted to make a compilation recipe for matplotlib would it be along these lines?
#!/bin/bash
VERSION_matplotlib=${VERSION_matplotlib:-1.4.3}
DEPS_matplotlib=(numpy python dateutil pyparsing six linpng pytz freetype agg PyCXX qhull ttconv)
URL_matplotlib=http://pypi.python.org/packages/source/m/matplotlib/matplotlib-$VERSION_matplotlib.tar.gz
MD5_matplotlib=f43c20480a1673185afefc7d4848a1d2
BUILD_matplotlib=$BUILD_PATH/matplotlib/$(get_directory $URL_matplotlib)
RECIPE_matplotlib=$RECIPES_PATH/matplotlib
# function called for preparing source code if needed
# (you can apply patch etc here.)
function prebuild_matplotlib() {
true
}
function shouldbuild_lxml() {
if [ -d "$SITEPACKAGES_PATH/matplotlib" ]; then
DO_BUILD=0
fi
}
# function called to build the source code
function build_matplotlib() {
cd $BUILD_matplotlib
push_arm
export CC="$CC -I$BUILD_numpy/"
export LDFLAGS="-L$BUILD_numpy/numpy/.libs -L$BUILD_numpy/numpy/.libs -L$BUILD_numpy/.libs -L$BUILD_numpy/numpy -L$BUILD_numpy/numpy -L$BUILD_numpy/ $LDFLAGS"
export LDSHARED="$LIBLINK"
chmod +x $BUILD_numpy/numpy-config
export PATH=$PATH:$BUILD_numpy
#plus more for the other dependencies
try $HOSTPYTHON setup.py build_ext -I$BUILD_matplotlib
try find . -iname '*.pyx' -exec $CYTHON {} \;
try $HOSTPYTHON setup.py build_ext -v
try find build/lib.* -name "*.o" -exec $STRIP {} \;
export PYTHONPATH=$BUILD_hostpython/Lib/site-packages
try $BUILD_hostpython/hostpython setup.py install -O2 --root=$BUILD_PATH/python-install --install-lib=lib/python2.7/site-packages
unset LDSHARED
pop_arm
}
# function called after all the compile have been done
function postbuild_matplotlib() {
true
}

Answer 1

You can call matplotlib from a kivy script fine, exactly as you normally would, but kivy has no built in way to display plots - you'd have to get matplotlib to render them (e.g. as png, or you could try kivy's experimental svg support but it might be buggy) then display them in an Image widget or similar.
If you want to do this on android or ios, you'd need a compilation recipe for matplotlib, as I don't think we have one yet. I think that shouldn't be too hard and we'd be happy to discuss if if you're interested.
We do have a GSoC student working on giving us proper matplotlib support, so there may be good news on it in the next few months.