py: Add native json printing using existing print framework.

Also add start of ujson module with dumps implemented.  Enabled in unix
and stmhal ports.  Test passes on both.

1 files changed, 23 insertions, 0 deletions

diff --git a/tests/extmod/ujson_dumps.py b/tests/extmod/ujson_dumps.py
new file mode 100644
index 0000000000..6e858fd3f9
--- /dev/null
+++ b/tests/extmod/ujson_dumps.py
@@ -0,0 +1,23 @@
+try:
+    import ujson as json
+except ImportError:
+    import json
+
+print(json.dumps(False))
+print(json.dumps(True))
+print(json.dumps(None))
+print(json.dumps(1))
+print(json.dumps(1.2))
+print(json.dumps('abc'))
+print(json.dumps('\x01\x7e\x7f\x80\u1234'))
+print(json.dumps([]))
+print(json.dumps([1]))
+print(json.dumps([1, 2]))
+print(json.dumps([1, True]))
+print(json.dumps(()))
+print(json.dumps((1,)))
+print(json.dumps((1, 2)))
+print(json.dumps((1, (2, 3))))
+print(json.dumps({}))
+print(json.dumps({"a":1}))
+print(json.dumps({"a":(2,[3,None])}))