关于python：IOError：[Errno 2]没有这样的文件或目录：’hdfs：///data/testdata.json’

IOError: [Errno 2] No such file or directory: 'hdfs:///data/testdata.json'

New to python coding, getting following error

I can view that testdata.json' that this location using

hdfs dfs -ls /data/testdata.json'

Traceback (most recent call last):
File"testdata.json'", line 6, in
with open('hdfs:///data/testdata.json') as data_file:
IOError: [Errno 2] No such file or directory: 'hdfs:///data/testdata.json'
python process_sensor_file.py

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#!/bin/python
import json
from pprint import pprint

with open('hdfs:///data/testdata.json',"r") as data_file:
source_data = json.load(data_file)
print(source_data)

print(json.dumps(source_data, indent=2))

for item in source_data['CityData']:
Longitude = item['Longitude']
TimeStamp = item['TimeStamp']
print(Longitude, TimeStamp)