[GO] Upload file to GCP's Cloud Storage (GCS) ~ Load with local Python

environment

• MacOS X 10.14.5 (Mojave)
• Homebrew 2.2.5
• Google Cloud SDK 279.0.0
• gsutil 4.47

GCP account registration

[Explanation with image] Register an account with a free trial of Google Cloud Platform (GCP)

Install Google Cloud SDK

Install Google Cloud SDK ~ Initialize

Project creation

Create a project with Google Cloud SDK

Bucket creation

$ gsutil is a command to operate storage.

$ gsutil mb -l us-central1 gs://Bucket name

File upload

• If there is no directory on gcs, it will be created.

$gsutil cp local file path gs://Bucket name/Directory name/file name

Service account / service account key creation

Create a service account / service account key so that you can access GCS from Python.

Service account creation

gcloud iam service-accounts create service account name\
                                   --display-name service account display name\

Check the permissions currently associated with the project

gcloud projects get-iam-policy mypj-id

# bindings:
# - members:
#   - user:[email protected]
#   role: roles/owner
# etag: BwWeTrntoao=
# version: 1

Grant permissions to service accounts

Grant storage administrator privileges

gcloud projects add-iam-policy-binding project ID\
--member serviceAccount:Service account name@Project ID.iam.gserviceaccount.com \
--role roles/storage.admin

role list

https://cloud.google.com/iam/docs/understanding-roles?hl=ja#predefined_roles

Check permissions again

gcloud projects get-iam-policy mypj-id

# bindings:
# - members:
#   - user:[email protected]
#   role: roles/owner
# - members:
#   - serviceAccount:[email protected]
#   role: roles/storage.admin
# etag: BwWeTz6vIBY=
# version: 1

Service account key creation

$ gcloud iam service-accounts keys create ./service_account_keys/anata_no_key.json \
--iam-account service account name@Project ID.iam.gserviceaccount.com

Directory structure

.
├── .env
├── service_account_keys/
│      └── anata_no_key.json
└── working/
        └── main.py

.env

With this description to set the path of the service account key created earlier in the environment variable. ** * Relative path from the loading source file (file loaded_dotenv ()) **

.env

GOOGLE_APPLICATION_CREDENTIALS=./service_account_keys/anata_no_key.json

Library installation

Install google-cloud-storage`` python-dotenv pandas with pip

$ pip install google-cloud-storage python-dotenv pandas

Download with Python

main.py

import os
from io import BytesIO

from dotenv import load_dotenv
from google.cloud import storage
import pandas as pd


# .Set the contents of env to environment variables
load_dotenv('./.env')

PROJECT_NAME = 'anata_no_project'
BUCKET_NAME = 'anata_no_bucket'
FILE_NAME = 'path/to/dir/train.csv' # gs://Bucket name/~The following path

client = storage.Client(PROJECT_NAME)
bucket = client.get_bucket(BUCKET_NAME)
blob = storage.Blob(FILE_NAME, bucket)
data = blob.download_as_string()
df = pd.read_csv(BytesIO(data))
print(df)

It is OK if it is displayed as df.