have diffable ignore output of value_counts()

Author: afeld

.vscode/settings.json

@@ -6,5 +6,6 @@
     "editor.formatOnSave": false
   },
   "workbench.externalBrowser": "chrome",
-  "editor.formatOnSave": false
+  "editor.formatOnSave": false,
+  "flake8.enabled": false
 }

extras/lib/diffable.py

@@ -28,11 +28,24 @@ def has_memory_address(cell: NotebookNode):
     )
 
 
+def is_value_count(source: str):
+    return ".value_counts(" in source
+
+
 def should_clear_output(cell: NotebookNode):
-    """Ignore any system command output, since things like package paths shown in warnings/errors can change between different systems. Also clear HTML output, since it often has generated IDs (from displacy, plotly, etc.) that change with each execution."""
+    """
+    Ignore:
+    - Any system command output, since things like package paths shown in warnings/errors can change between different systems
+    - HTML output, since it often has generated IDs (from displacy, plotly, etc.) that change with each execution
+    - `value_counts()` output, since the order of the index seems to differ by machine/OS
+    """
+
     source = cell["source"]
     return (
-        is_system_command(source) or has_rich_output(cell) or has_memory_address(cell)
+        is_system_command(source)
+        or has_rich_output(cell)
+        or has_memory_address(cell)
+        or is_value_count(source)
     )