$ pip install --upgrade google-cloud-storage

from google.cloud import storage
client = storage.Client()

bucket = storage.Bucket(client)
bucket.name = "test-bucket"
bucket.location = "asia-northeast1"
client.create_bucket(bucket)

bucket_name = "test-bucket"
bucket = client.get_bucket(bucket_name)

for bucket in client.list_buckets():
    print(bucket.name)

# test-bucket1
# test-bucket2
# test-bucket3

print(bucket.exists())

# True

bucket.delete(force=True)

for blob in client.list_blobs(bucket_name):
    print(blob.name)

# test_dir/
# test_dir/hoge.txt
# test_dir/test_file_in_dir_1.txt
# test_dir/test_file_in_dir_2.txt
# test_file_1.txt
# test_file_2.txt

for blob in client.list_blobs(bucket_name, prefix="test_dir/test"):
    print(blob.name)

# test_dir/test_file_in_dir_1.txt
# test_dir/test_file_in_dir_2.txt

blob = bucket.blob("test_dir/test_file_in_dir_1.txt") #Specify storage path

print(blob.exists())

# True

blob.download_to_filename("test_file_in_dir_1.txt") #Specify the download destination path

blob.upload_from_filename("test_file_in_dir_1.txt") #Specify the upload source path

blob.delete()

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