done

lib/python3.11/site-packages/_plotly_utils/files.py

@@ -0,0 +1,37 @@
+import os
+
+PLOTLY_DIR = os.environ.get(
+    "PLOTLY_DIR", os.path.join(os.path.expanduser("~"), ".plotly")
+)
+TEST_FILE = os.path.join(PLOTLY_DIR, ".permission_test")
+
+
+def _permissions():
+    try:
+        if not os.path.exists(PLOTLY_DIR):
+            try:
+                os.mkdir(PLOTLY_DIR)
+            except Exception:
+                # in case of race
+                if not os.path.isdir(PLOTLY_DIR):
+                    raise
+        with open(TEST_FILE, "w") as f:
+            f.write("testing\n")
+        try:
+            os.remove(TEST_FILE)
+        except Exception:
+            pass
+        return True
+    except Exception:  # Do not trap KeyboardInterrupt.
+        return False
+
+
+_file_permissions = None
+
+
+def ensure_writable_plotly_dir():
+    # Cache permissions status
+    global _file_permissions
+    if _file_permissions is None:
+        _file_permissions = _permissions()
+    return _file_permissions