testColormaps.py

import unittest
import pygsti
import numpy as np
import sys
import warnings
import os
import plotly.graph_objs as go

from ..testutils import BaseTestCase, temp_files, compare_files
from pygsti.report import colormaps as cmap
from pygsti.report.figure import ReportFigure

try:
    import matplotlib
    bMPL = True
except ImportError:
    bMPL = False


class ColormapTests(BaseTestCase):
    def setUp(self):
        super(ColormapTests, self).setUp()

    def test_colormap_helpers(self):
        self.assertTrue(np.all(cmap.as_rgb_array("rgb(0,255,128)") ==  np.array([0,255,128])))
        self.assertTrue(np.all(cmap.as_rgb_array("rgba(0,255,128,0.5)") ==  np.array([0,255,128])))
        self.assertTrue(np.all(cmap.as_rgb_array("#00FF80") ==  np.array([0,255,128])))
        with self.assertRaises(ValueError):
            cmap.as_rgb_array("foobar")

        plotlyColorscale = [ (0.0,"#FFFFFF"), (1.0,"rgb(0,0,0)") ]
        print(cmap.interpolate_plotly_colorscale(plotlyColorscale, 0.5))
        self.assertEqual(cmap.interpolate_plotly_colorscale(plotlyColorscale, 0.5), 'rgb(128,128,128)')
        self.assertEqual(cmap.interpolate_plotly_colorscale(plotlyColorscale, 0.0), 'rgb(255,255,255)')
        self.assertEqual(cmap.interpolate_plotly_colorscale(plotlyColorscale, 1.0), 'rgb(0,0,0)')

    def test_colormap_construction(self):

        colors = [ (0.0, (1.0,1.0,1.0)), (1.0,(0.,0.,0.)) ]
        base_cmap = cmap.Colormap(colors, 1.0, 10.0)
        if bMPL:
            mpl_norm, mpl_cmap = base_cmap.get_matplotlib_norm_and_cmap()

        for llcolor in ("red","blue","green","cyan","yellow","purple"):
            llcmap = cmap.LinlogColormap(1.0, 10.0, 16, 0.95, 1, llcolor)
            if bMPL:
                mpl_norm, mpl_cmap = llcmap.get_matplotlib_norm_and_cmap()
            
        with self.assertRaises(ValueError):
            cmap.LinlogColormap(1.0, 10.0, 16, 0.95, 1, color="foobar")

        divcmap = cmap.DivergingColormap(1.0, 10.0, color="RdBu")
        with self.assertRaises(ValueError):
            cmap.DivergingColormap(1.0, 10.0, color="foobar")

        for seqcolor in ("whiteToBlack","blackToWhite","whiteToBlue","whiteToRed"):
            seqcmap = cmap.SequentialColormap(1.0, 10.0, seqcolor)
        with self.assertRaises(ValueError):
            cmap.SequentialColormap(1.0, 10.0, color="foobar")

        cmap.PiecewiseLinearColormap( colors )

    def test_mpl_conversion(self):
        try:
            import matplotlib
            from pygsti.report import mpl_colormaps
            from pygsti.report.mpl_colormaps import plotly_to_matplotlib
        except ImportError:
            return # no matplotlib => stop here

        #Quick test of linlog inverse function (never used)
        llcmap = cmap.LinlogColormap(1.0, 10.0, 16, 0.95, 1, "red")
        mpl = pygsti.report.mpl_colormaps.mpl_LinLogNorm(llcmap)
        x = mpl.inverse(1.0) # test out inverse() function
        xar = mpl.inverse(np.array([1.0,2.0],'d'))


        # Test plotly -> matplotlib conversion
        data = []        
        data.append( go.Scatter(
                x = [1,2,3],
                y = [3,4,5],
                mode = 'lines+markers',
                line = dict(width=2, color="blue",dash='dash'),
                name = 'Test1',
                showlegend=True
            ))
        data.append( go.Scattergl(x=[2,4,6], y=[1,3,9],
                                  mode="markers",
                                  showlegend=True) )
        
        layout = go.Layout(
	    width=800,
            height=400,
            title="my title",
            titlefont=dict(size=16),
	    xaxis=dict(
                title="my xlabel",
		titlefont=dict(size=14),
                side="top",
                type="log",
            ),
            yaxis=dict(
                title='Mean survival probability',
                titlefont=dict(size=14),
                side="right",
                type="log",
            ),
            legend=dict(
                font=dict(
                    size=13,
                ),
            )
        )
        plotly_fig = go.Figure(data=list(data), layout=layout)
        pygsti_fig = ReportFigure(plotly_fig, colormap=None, pythonValue=None)
        
        mpl_fig = plotly_to_matplotlib(pygsti_fig)
        
        plotly_to_matplotlib(pygsti_fig,temp_files + "/testMPL.pdf")

        with self.assertRaises(ValueError):
            fig = ReportFigure(plotly_fig, colormap=None, pythonValue=None, special="foobar")
            plotly_to_matplotlib(fig)

        #Heatmap
        nX = 5
        nY = 3
        heatmap_data = [ go.Heatmap(z=np.ones((nY,nX),'d'),
                                    colorscale=[ [0, 'white'], [1, 'black'] ],
                                    showscale=False, zmin=0,zmax=1,hoverinfo='none') ]
        seqcmap = cmap.SequentialColormap(0, 10.0, "whiteToBlack")
        del layout['xaxis']['type']  # heatmaps don't play well with
        del layout['yaxis']['type']  # log scales
        heatmap_fig = ReportFigure(go.Figure(data=heatmap_data, layout=layout), seqcmap, plt_data=np.ones((nY,nX),'d'))
        plotly_to_matplotlib(heatmap_fig, temp_files + "/testMPLHeatmap.pdf")

        #bad mode
        data = [ go.Scatter(x = [0,1,2], y = [3,4,5],
                            mode = 'foobar') ]
        fig = ReportFigure(go.Figure(data=data, layout=layout))
        with self.assertRaises(ValueError):
            plotly_to_matplotlib(fig) #invalid mode


        
            

        
if __name__ == '__main__':
    import unittest
    unittest.main(verbosity=1)