Using Python to Operate Couchbase
To operate the Couchbase database in Python, we can use the Couchbase Python SDK. This SDK is an official Python client library provided by Couchbase for interacting with the Couchbase database.
Firstly, you need to install the Couchbase Python SDK. You can use the pip command for installation:
pip install couchbase
Next, we can use Python to connect to the Couchbase database and perform data operations as follows:
1. Import necessary class libraries:
python
from couchbase.cluster import Cluster, ClusterOptions
from couchbase.auth import PasswordAuthenticator
2. Create a Couchbase cluster connection:
python
cluster = Cluster('couchbase://localhost', ClusterOptions(
PasswordAuthenticator('username', 'password')))
Please replace 'localhost' with the host address of your Couchbase database. If you have set a username and password, please replace 'username' and 'password' with the correct values.
3. Open a bucket:
python
bucket = cluster.bucket('bucket_name')
Insert 'bucket'_ Replace 'name' with the bucket name of the Couchbase database you want to connect to.
4. Obtain a set:
python
collection = bucket.default_collection()
This will return an object used to manipulate the default collection in the specified bucket.
5. Insert data:
python
document = {'key': 'value'}
collection.upsert('document_id', document)
Replace ` document_ ID 'is the unique identifier (ID) of the document you want to insert.
6. Query data:
python
result = collection.get('document_id')
print(result.content_as[str])
This will return the document content for the specified ID.
7. Modify data:
python
result = collection.get('document_id')
document = result.content_as[dict]
document['key'] = 'new_value'
collection.replace('document_id', document)
8. Delete data:
python
collection.remove('document_id')
9. Close connection:
python
cluster.disconnect()
This is a complete Python code example:
python
from couchbase.cluster import Cluster, ClusterOptions
from couchbase.auth import PasswordAuthenticator
cluster = Cluster('couchbase://localhost', ClusterOptions(
PasswordAuthenticator('username', 'password')))
bucket = cluster.bucket('bucket_name')
collection = bucket.default_collection()
document = {'key': 'value'}
collection.upsert('document_id', document)
result = collection.get('document_id')
print(result.content_as[str])
result = collection.get('document_id')
document = result.content_as[dict]
document['key'] = 'new_value'
collection.replace('document_id', document)
collection.remove('document_id')
cluster.disconnect()
Please ensure to replace the actual host address, username, password, and bucket name in order to successfully connect and operate the Couchbase database.
