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Pdfpages pagecount convenience getter method #2440

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Merged
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Sep 19, 2013
Merged

Pdfpages pagecount convenience getter method #2440

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172a494
add convenience pagecount getter method for PdfPages
megies Sep 19, 2013
cccc22a
add test for pagecount getter of PdfPages
megies Sep 19, 2013
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6 changes: 6 additions & 0 deletions lib/matplotlib/backends/backend_pdf.py
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Original file line number Diff line number Diff line change
Expand Up @@ -2310,6 +2310,12 @@ def savefig(self, figure=None, **kwargs):
else:
figureManager.canvas.figure.savefig(self, format='pdf', **kwargs)

def get_pagecount(self):
"""
Returns the current number of pages in the multipage pdf file.
"""
return len(self._file.pageList)

class FigureCanvasPdf(FigureCanvasBase):
"""
The canvas the figure renders into. Calls the draw and print fig
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20 changes: 20 additions & 0 deletions lib/matplotlib/tests/test_backend_pdf.py
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Expand Up @@ -37,3 +37,23 @@ def test_type42():
ax = fig.add_subplot(111)
ax.plot([1,2,3])
fig.savefig(io.BytesIO())


@cleanup
def test_multipage_pagecount():
from matplotlib.backends.backend_pdf import PdfPages
from io import BytesIO
with PdfPages(BytesIO()) as pdf:
assert pdf.get_pagecount() == 0
fig = plt.figure()
ax = fig.add_subplot(111)
ax.plot([1, 2, 3])
fig.savefig(pdf, format="pdf")
assert pdf.get_pagecount() == 1
pdf.savefig()
assert pdf.get_pagecount() == 2


if __name__ == '__main__':
import nose
nose.runmodule(argv=['-s', '--with-doctest'], exit=False)