Fixes issue fastai#69 Visual Studio Code does not render progress bar…

…s correctly

fastprogress/_nbdev.py

@@ -11,6 +11,7 @@
          "IN_NOTEBOOK": "00_core.ipynb",
          "ProgressBar": "01_fastprogress.ipynb",
          "MasterBar": "01_fastprogress.ipynb",
+         "NBOutput": "01_fastprogress.ipynb",
          "NBProgressBar": "01_fastprogress.ipynb",
          "NBMasterBar": "01_fastprogress.ipynb",
          "NO_BAR": "01_fastprogress.ipynb",

fastprogress/fastprogress.py

@@ -1,8 +1,9 @@
 # AUTOGENERATED! DO NOT EDIT! File to edit: nbs/01_fastprogress.ipynb (unless otherwise specified).
 
-__all__ = ['ProgressBar', 'MasterBar', 'NBProgressBar', 'NBMasterBar', 'NO_BAR', 'WRITER_FN', 'FLUSH', 'SAVE_PATH',
-           'SAVE_APPEND', 'MAX_COLS', 'printing', 'ConsoleProgressBar', 'print_and_maybe_save', 'ConsoleMasterBar',
-           'master_bar', 'progress_bar', 'force_console_behavior', 'workaround_empty_console_output']
+__all__ = ['ProgressBar', 'MasterBar', 'NBOutput', 'NBProgressBar', 'NBMasterBar', 'NO_BAR', 'WRITER_FN', 'FLUSH',
+           'SAVE_PATH', 'SAVE_APPEND', 'MAX_COLS', 'printing', 'ConsoleProgressBar', 'print_and_maybe_save',
+           'ConsoleMasterBar', 'master_bar', 'progress_bar', 'force_console_behavior',
+           'workaround_empty_console_output']
 
 # Cell
 import time,os,shutil
@@ -98,16 +99,30 @@ def update(self, val): self.main_bar.update(val)
     try:
         from IPython.display import clear_output, display, HTML
         import matplotlib.pyplot as plt
+        import ipywidgets as widgets
     except:
         warn("Couldn't import ipywidgets properly, progress bar will use console behavior")
         IN_NOTEBOOK = False
 
+# Cell
+class NBOutput():
+    def __init__(self, to_display):
+        self.out = widgets.Output()
+        display(self.out)
+        with self.out:
+            display(to_display)
+
+    def update(self, to_update):
+        with self.out:
+            clear_output(wait=True)
+            display(to_update)
+
 # Cell
 class NBProgressBar(ProgressBar):
     def on_iter_begin(self):
         super().on_iter_begin()
         self.progress = html_progress_bar(0, self.total, "")
-        if self.display: self.out = display(HTML(self.progress), display_id=True)
+        if self.display: self.out = NBOutput(HTML(self.progress))
         self.is_active=True
 
     def on_interrupt(self):
@@ -138,7 +153,7 @@ def __init__(self, gen, total=None, hide_graph=False, order=None, clean_on_inter
 
     def on_iter_begin(self):
         self.html_code = '\n'.join([html_progress_bar(0, self.main_bar.total, ""), ""])
-        self.out = display(HTML(self.html_code), display_id=True)
+        self.out = NBOutput(HTML(self.html_code))
 
     def on_interrupt(self):
         if self.clean_on_interrupt: self.out.update(HTML(''))
@@ -182,14 +197,14 @@ def show_imgs(self, imgs, titles=None, cols=4, imgsize=4, figsize=None):
         if titles is None: titles = [None] * len(imgs)
         for img, ax, title in zip(imgs, imgs_axs.flatten(), titles): img.show(ax=ax, title=title)
         for ax in imgs_axs.flatten()[len(imgs):]: ax.axis('off')
-        if not hasattr(self, 'imgs_out'): self.imgs_out = display(self.imgs_fig, display_id=True)
+        if not hasattr(self, 'imgs_out'): self.imgs_out = NBOutput(self.imgs_fig)
         else: self.imgs_out.update(self.imgs_fig)
 
     def update_graph(self, graphs, x_bounds=None, y_bounds=None, figsize=(6,4)):
         if self.hide_graph: return
         if not hasattr(self, 'graph_fig'):
             self.graph_fig, self.graph_ax = plt.subplots(1, figsize=figsize)
-            self.graph_out = display(self.graph_ax.figure, display_id=True)
+            self.graph_out = NBOutput(self.graph_ax.figure)
         self.graph_ax.clear()
         if len(self.names) < len(graphs): self.names += [''] * (len(graphs) - len(self.names))
         for g,n in zip(graphs,self.names): self.graph_ax.plot(*g, label=n)