Python example of DataONE CN.getSystemMetadata()

get_sysmeta.py

#!/bin/env python3
from d1_client.cnclient_2_0 import CoordinatingNodeClient_2_0
from d1_common.types import dataoneTypes
import os

# Set up the CN client with a token
token = os.environ["token"]
headers = {"Authorization": "Bearer " + token}
base_url = "https://cn.dataone.org/cn"
cn = CoordinatingNodeClient_2_0(base_url, headers = headers)

# Limit the objects listed
count = 100
nodeId = "urn:node:ESS_DIVE"

# Get an object list
object_list = cn.listObjects(count = count, nodeId = nodeId)

# Get system metadata for each object
for objectinfo in object_list.content():
    try:
        sysmeta = cn.getSystemMetadata(objectinfo.identifier.value())
        print(sysmeta.identifier.value())
        print("----------------------------------------------------")
        
        # Get the list of replicas
        replicas = sysmeta.replica
        
        # Show each replica status of the object
        for replica in replicas:
            node = replica.replicaMemberNode.value()
            status = replica.replicationStatus
            verified = str(replica.replicaVerified)
            print("{}\t{}\t{}".format(node, status, verified))
        print("\n")
    except IOError as ioe:
        print(ioe)