Support partial function inspection in data migrations

tests/test_project/app_data_migrations/migrations/0004_partial_function.py

@@ -0,0 +1,26 @@
+# Generated by Django 2.2 on 2020-01-27 17:47
+
+from __future__ import annotations
+
+import functools
+
+from django.db import migrations
+
+
+def backward_op(c, david, test):
+    pass
+
+
+def forward_op(const, arg1, arg2):
+    pass
+
+
+class Migration(migrations.Migration):
+    dependencies = [("app_data_migrations", "0003_incorrect_arguments")]
+
+    operations = [
+        migrations.RunPython(
+            functools.partial(forward_op, "constant"),
+            functools.partial(backward_op, "constant"),
+        )
+    ]