Update win_batch_md2ipynb.py

build/win_batch_md2ipynb.py

@@ -15,7 +15,7 @@ def mkdir_if_not_exist(path):
         os.makedirs(os.path.join(*path))
 
 # Timeout for each notebook, in sec
-timeout = 20 * 60
+timeout = 60 * 60
 
 # The files will be ingored for execution
 ignore_execution = ['chapter_computational-performance/async-computation.md']
@@ -32,19 +32,24 @@ for chap in glob.glob(os.path.join('..', 'chapter_*')):
         if md != 'index.md':
             in_md = os.path.join(chap, md)
             out_nb = os.path.join('win_ipynb', in_md[3:-2] + 'ipynb')
-            print('---', in_md[3:])
-            # read
-            with open(in_md, 'r', encoding="utf8") as f:
-                notebook = reader.read(f)
-
-            if do_eval and chap[3:] + '/' + md not 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))
+
+            if not os.path.exists(out_nb):
+
+                print('---', in_md[3:])
+                # read
+                with open(in_md, 'r', encoding="utf8") as f:
+                    notebook = reader.read(f)
+
+                if do_eval and chap[3:] + '/' + md not 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))
+
+