code sample for pandas-dev#37783

Author: simonjayhawkins

bisect/37783.py

@@ -0,0 +1,21 @@
+# BUG: json_normalize generates TypeError: 'NoneType' object is not subscriptable
+# as metadata object is not always present. #37783
+
+import pandas as pd
+
+print(pd.__version__)
+
+file = [
+    {"values": ["1", "2"], "metadata": {"name": "first_value"}},
+    {"values": ["3", "4"], "metadata": None},
+]
+
+try:
+    df = pd.json_normalize(
+        file, record_path="values", meta=[["metadata", "name"]], errors="ignore"
+    )
+except TypeError as e:
+    print(e)
+else:
+    print(df)
+    exit(1)