add: trace log example

examples/groonga_microblog_tutorial/4_search_with_trace_log.py

@@ -0,0 +1,45 @@
+from poyonga import Groonga
+
+
+def _call(g, cmd, **kwargs):
+    ret = g.call(cmd, **kwargs)
+    print("status:", ret.status)
+    if cmd == "select":
+        print("item:", len(ret.items))
+        for item in ret.items:
+            print(item)
+        print(f"[trace_log] {ret.trace_logs}")
+        print("=*=" * 30)
+
+
+g = Groonga()
+
+_call(
+    g,
+    "select",
+    table="Users",
+    match_columns="name,location_str,description",
+    query="東京",
+    output_columns="_key,name",
+    output_trace_log="yes",
+    command_version="3",
+)
+_call(
+    g,
+    "select",
+    table="Users",
+    filter='geo_in_circle(location,"128484216x502919856",5000)',
+    output_columns="_key,name",
+    output_trace_log="yes",
+    command_version="3",
+)
+_call(
+    g,
+    "select",
+    table="Comments",
+    filter="last_modified<=1268802000",
+    output_columns="posted_by.name,comment,last_modified",
+    drilldown="hash_tags,posted_by",
+    output_trace_log="yes",
+    command_version="3",
+)