Python3 で Google Datastore のデータを作成 (Create)

Google Datastore に次のようなデータを作成するプログラムです。

datastore_create.py

#! /usr/bin/python
#
#   datastore_create.py
#                       May/18/2018
# ------------------------------------------------------------------
from gcloud import datastore
import sys
import  datetime
# ------------------------------------------------------------------
def add_data_proc(client,name,name_city,population):
    sys.stderr.write("name = " + name + "\n")
    kind = 'Cities'
    key = client.key(kind,name)

    task = datastore.Entity(key)

    task.update({
        'name_city': name_city,
        'population': population,
        'date_mod': datetime.datetime.utcnow()
        })

    client.put(task)

    return task.key

# ------------------------------------------------------------------
sys.stderr.write("*** start ***\n")

try:
    project_id = "my-project-aug-29-2016"
    client = datastore.Client(project_id)
except Exception as ee:
    sys.stderr.write("*** error *** in datastore.Client ***\n")
    sys.stderr.write(str(ee) + "\n")
#
sys.stderr.write("*** bbb ***\n")
add_data_proc(client,'t0921','宇都宮', 38921)
add_data_proc(client,'t0922','小山', 56413)
add_data_proc(client,'t0923','佐野', 92385)
add_data_proc(client,'t0924','足利', 39546)
add_data_proc(client,'t0925','日光', 18492)
#
#
sys.stderr.write("*** end ***\n")
#
# ------------------------------------------------------------------

実行コマンド

export GOOGLE_APPLICATION_CREDENTIALS="/home/uchida/my_project_Aug29-2016-4363ff6a1234.json"
./datastore_create.py