doc changes

Author: dickreuter

doc/source/whatsnew/v0.20.0.txt

@@ -62,6 +62,7 @@ Other enhancements
 - ``pd.DataFrame.plot`` now prints a title above each subplot if ``suplots=True`` and ``title`` is a list of strings (:issue:`14753`)
 - ``pd.Series.interpolate`` now supports timedelta as an index type with ``method='time'`` (:issue:`6424`)
 - ``pandas.io.json.json_normalize`` If meta keys are not always present a new option to set errors="ignore" (:issue:`14583`)
+- ``pandas.io.json.json_normalize`` gained the option ``errors='ignore'|raise``; the default is raise and is backward compatible. (:issue:`14583`)
 
 
 .. _whatsnew_0200.api_breaking:

pandas/io/json.py

@@ -743,7 +743,8 @@ def json_normalize(data, record_path=None, meta=None,
         path to records is ['foo', 'bar']
     meta_prefix : string, default None
     error: {'raise', 'ignore'}, default 'raise'
-        * ignore: will ignore keyErrors if keys listed in meta are not always present
+        * ignore: will ignore KeyError if keys listed in meta are not always present
+        * raise: will raise KeyError if keys listed in meta are not always present
 
     Returns
     -------
@@ -849,9 +850,7 @@ def _recursive_extract(data, path, seen_meta, level=0):
                             if errors == 'ignore':
                                 meta_val = np.nan
                             else:
-                                raise \
-                                    KeyError(
-                                    "Try running with errors='ignore' as key may not always be present: %s", e)
+                                raise KeyError("Try running with errors='ignore' as key %s is not always present.", e)
                     meta_vals[key].append(meta_val)
 
                 records.extend(recs)

pandas/io/tests/json/test_json_norm.py

@@ -227,7 +227,7 @@ def test_nested_flattens(self):
 
 
     def test_json_normalize_errors(self):
-        # If meta keys are not always present a new option to set errors='ignore' has been implemented (:issue:`14583`)
+        # GH14583: If meta keys are not always present a new option to set errors='ignore' has been implemented
         i = {
             "Trades": [{
                 "general": {