add batch md2ipynb for windows

build/win_batch_md2ipynb.py

@@ -0,0 +1,48 @@
+import glob
+import nbformat
+import notedown
+import os
+from subprocess import check_output
+import sys
+import time
+
+
+def mkdir_if_not_exist(path):
+    if not os.path.exists(os.path.join(*path)):
+        os.makedirs(os.path.join(*path))
+
+# timeout for each notebook, in sec
+timeout = 20 * 60
+
+# the files will be ingored for execution
+ignore_execution = []
+
+reader = notedown.MarkdownReader(match='strict')
+
+do_eval = int(os.environ.get('EVAL', True))
+
+for chap in glob.glob('chapter_*'):
+    mkdir_if_not_exist(['build', 'win_ipynb', chap])
+    mds = filter(lambda x: x.endswith('md'), os.listdir(chap))
+    for md in mds:
+        if md != 'index.md':
+            in_md = os.path.join(chap, md)
+            out_nb = os.path.join('build', in_md[:-2] + '.ipynb')
+            print('---', in_md)
+            # read
+            with open(in_md, 'r', encoding="utf8") as f:
+                notebook = reader.read(f)
+
+            if do_eval and not any([i in input_fn for i in ignore_execution]):
+                tic = time.time()
+                notedown.run(notebook, timeout)
+                print('=== Finished evaluation in %f sec'%(time.time()-tic))
+
+            # write
+            # need to add language info to for syntax highlight
+            notebook['metadata'].update({'language_info':{'name':'python'}})
+
+            with open(out_nb, 'w', encoding="utf8") as f:
+                f.write(nbformat.writes(notebook))
+
+