fix tutorial exporter to work with greek letters

Author: phobson

docs/tutorial/closer_look_at_plot_pos.ipynb

@@ -154,8 +154,8 @@
    },
    "outputs": [],
    "source": [
-    "w_opts = {'label': 'Weibull (a=0, b=0)',     'marker': 'o', 'markeredgecolor': 'b'}\n",
-    "c_opts = {'label': 'Cunnane (a=0.4, b=0.4)', 'marker': 's', 'markeredgecolor': 'g'}\n",
+    "w_opts = {'label': 'Weibull (α=0, β=0)',     'marker': 'o', 'markeredgecolor': 'b'}\n",
+    "c_opts = {'label': 'Cunnane (α=0.4, β=0.4)', 'marker': 's', 'markeredgecolor': 'g'}\n",
     "\n",
     "common_opts = {\n",
     "    'markerfacecolor': 'none',\n",
@@ -198,7 +198,7 @@
    },
    "outputs": [],
    "source": [
-    "h_opts = {'label': 'Hazen (a=0.5, b=0.5)', 'marker': '^', 'markeredgecolor': 'r'}\n",
+    "h_opts = {'label': 'Hazen (α=0.5, β=0.5)', 'marker': '^', 'markeredgecolor': 'r'}\n",
     "fig, (ax1, ax2) = pyplot.subplots(figsize=(10, 8), ncols=2, sharex=True, sharey=False)\n",
     "\n",
     "for dist, ax in zip([None, weibull], [ax1, ax2]):\n",

docs/tutorial/getting_started.ipynb

@@ -208,11 +208,11 @@
     "\n",
     "beta1 = stats.beta(a=3, b=2)\n",
     "ax2.set_xscale('prob', dist=beta1)\n",
-    "ax2.set_xlabel('Beta probability scale (a=3, b=2)')\n",
+    "ax2.set_xlabel('Beta probability scale (α=3, β=2)')\n",
     "\n",
     "beta2 = stats.beta(a=2, b=7)\n",
     "ax3.set_xscale('prob', dist=beta2)\n",
-    "ax3.set_xlabel('Beta probability scale (a=2, b=7)')\n",
+    "ax3.set_xlabel('Beta probability scale (α=2, β=7)')\n",
     "\n",
     "ax4.set_xticks(ax1.get_xticks()[12:-12])\n",
     "ax4.set_xlabel('Linear scale (for reference)')\n",

docs/tutorial/make.py

@@ -2,61 +2,33 @@
 import glob
 
 import nbformat
-from nbconvert import RSTExporter, preprocessors
+from nbconvert import RSTExporter
+from nbconvert.preprocessors import ExecutePreprocessor
 
 
-def cache(nbfile):
+def convert(nbfile):
     basename, _ = os.path.splitext(nbfile)
-    bakfile = basename + '.bak'
-    with open(nbfile, 'r') as nb, open(bakfile, 'w') as bak:
-        bak.write(nb.read())
-    return bakfile
-
 
-def process(nbfile, processor):
     meta = {'metadata': {'path': '.'}}
-    with open(nbfile, 'r') as nbf:
-        nbook = nbformat.read(nbf, as_version=4)
-
-    runner = processor(timeout=600, kernel_name='probscale')
-    runner.preprocess(nbook, meta)
-
-    with open(nbfile, 'w') as nbf:
-        nbformat.write(nbook, nbf)
+    with open(nbfile, 'r', encoding='utf-8') as nbf:
+        nbdata = nbformat.read(nbf, as_version=4, encoding='utf-8')
 
+    runner = ExecutePreprocessor(timeout=600, kernel_name='probscale')
+    runner.preprocess(nbdata, meta)
 
-def convert(nbfile):
-    basename, _ = os.path.splitext(nbfile)
     img_folder = basename + '_files'
-    os.makedirs(img_folder, exist_ok=True)
-    print("\tconverting " + nbfile)
-
-    with open(nbfile, 'r') as nb:
-        nbdata = nbformat.reads(nb.read(), as_version=4)
-
-    rst = RSTExporter()
-    body_raw, images = rst.from_notebook_node(nbdata)
+    body_raw, images = RSTExporter().from_notebook_node(nbdata)
     body_final = body_raw.replace('.. image:: ', '.. image:: {}/'.format(img_folder))
 
-    with open(basename + '.rst', 'w') as rst_out:
+    with open(basename + '.rst', 'w', encoding='utf-8') as rst_out:
         rst_out.write(body_final)
 
     for img_name, img_data in images['outputs'].items():
         img_path = os.path.join(img_folder, img_name)
         with open(img_path, 'wb') as img:
-            print('\twriting ' + img_path)
             img.write(img_data)
 
 
 if __name__ == '__main__':
     for nbfile in glob.glob('*.ipynb'):
-        bak = cache(nbfile)
-        success = False
-        try:
-            process(nbfile, preprocessors.ExecutePreprocessor)
-            convert(nbfile)
-            success = True
-        finally:
-            process(nbfile, preprocessors.ClearOutputPreprocessor)
-        if success:
-            os.remove(bak)
+        convert(nbfile)