JSON comments

Author: TomAugspurger

pandas/_libs/src/ujson/python/objToJSON.c

@@ -227,6 +227,8 @@ static PyObject *get_values(PyObject *obj) {
     PyObject *values = PyObject_GetAttrString(obj, "values");
     PRINTMARK();
 
+    // Not part of the EA-interface. Just a temporary fix to get
+    // things working for DatetimeArray.
     if (PyObject_HasAttrString(obj, "_to_json_values")) {
         PyObject *subvals = PyObject_CallMethod(obj, "_to_json_values", NULL);
         Py_DECREF(values);

pandas/core/arrays/datetimes.py

@@ -1568,6 +1568,8 @@ def to_julian_date(self):
                  ) / 24.0)
 
     def _to_json_values(self):
+        # Patch to get JSON serialization working again.
+        # Not part of the public API.
         from pandas import DatetimeIndex
         return DatetimeIndex(self)
 

pandas/core/internals/blocks.py

@@ -3013,6 +3013,8 @@ def get_values(self, dtype=None):
             return values.reshape(1, -1)
 
     def _to_json_values(self):
+        # Patch to get JSON serialization working again.
+        # Not part of the public API.
         from pandas import DatetimeIndex
         return DatetimeIndex(self.values)