[PATCH v2] usertools: telemetry json support pretty print

[Chengwen Feng <fengchengwen@huawei.com>]

Currently, the dpdk-telemetry.py show json in raw format, which is not
good for human reading.

E.g. The command '/ethdev/xstats,0' will output:
{"/ethdev/xstats": {"rx_good_packets": 0, "tx_good_packets": 0,
"rx_good_bytes": 0, "tx_good_bytes": 0, "rx_missed_errors": 0,
"rx_errors": 0, "tx_errors": 0, "rx_mbuf_allocation_errors": 0,
"rx_q0_packets": 0,...}}

This patch supports json pretty print by adding extra indent=4
parameter, so the same command will output:
{
    "/ethdev/xstats": {
        "rx_good_packets": 0,
        "tx_good_packets": 0,
        "rx_good_bytes": 0,
        "tx_good_bytes": 0,
        "rx_missed_errors": 0,
        "rx_errors": 0,
        "tx_errors": 0,
        "rx_mbuf_allocation_errors": 0,
        "rx_q0_packets": 0,
        ...
    }
}

Signed-off-by: Chengwen Feng <fengchengwen@huawei.com>

---
v2: fix typo of output.

---
 usertools/dpdk-telemetry.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/usertools/dpdk-telemetry.py b/usertools/dpdk-telemetry.py
index a81868a547..315f78fb8f 100755
--- a/usertools/dpdk-telemetry.py
+++ b/usertools/dpdk-telemetry.py
@@ -33,7 +33,7 @@ def read_socket(sock, buf_len, echo=True):
         sock.close()
         raise
     if echo:
-        print(json.dumps(ret))
+        print(json.dumps(ret, indent=4))
     return ret
 
 
-- 
2.17.1