Python API for LabKey Server

Lets you query, insert, and update data on a LabKey Server using Python.

Features

The following APIs can be used against a LabKey Server instance.

Query API (labkey.query)

• delete_rows() - Delete records in a table.
• execute_sql() - Execute SQL (LabKey SQL dialect) through the query module.
• insert_rows() - Insert rows into a table.
• select_rows() - Query and get results sets.
• update_rows() - Update rows in a table.

Experiment API (labkey.experiment)

• load_batch() - Retrieve assay data (batch level).
• save_batch() - Save assay data (batch level)

Security API (labkey.security). Available for administrating and configuring user accounts and permissions.

Installation

To install, simply use pip:

$ pip install labkey

Note: For users who installed this package before it was published to PyPI (before v0.3.0) it is recommended you uninstall and reinstall the package rather than attempting to upgrade. This is due to a change in the package's versioning semantics.

Credentials

Set Up a netrc File

On a Mac, UNIX, or Linux system the netrc file should be named .netrc (dot netrc) and on Windows it should be named _netrc (underscore netrc). The file should be located in your home directory and the permissions on the file must be set so that you are the only user who can read it, i.e. it is unreadable to everyone else.

To create the netrc on a Windows machine, first create an environment variable called ’HOME’ that is set to your home directory (for example, C:/Users/johndoe) or any directory you want to use.

In that directory, create a text file with the prefix appropriate to your system, either an underscore or dot.

The following three lines must be included in the file. The lines must be separated by either white space (spaces, tabs, or newlines) or commas:

machine <remote-instance-of-labkey-server>
login <user-email>
password <user-password>

For example:

machine mymachine.labkey.org
login [email protected]
password mypassword

Note that the netrc file only deals with connections at the machine level and should not include a port or protocol designation, meaning both "mymachine.labkey.org:8888" and "https://mymachine.labkey.org" are incorrect.

Old credentials

As of v0.4.0 this API no longer supports using a .labkeycredentials.txt file, and now uses the .netrc files similar to the other labkey APIs. Additional .netrc setup instructions can be found at the link.

Examples

Sample code is available in the samples directory.

The following gets data from the Users table on your local machine:

from labkey.utils import create_server_context
from labkey.query import select_rows

print("Create a server context")
labkey_server = 'localhost:8080'
project_name = 'ModuleAssayTest'  # Project folder name
contextPath = 'labkey'
schema = 'core'
table = 'Users'

server_context = create_server_context(labkey_server, project_name, contextPath, use_ssl=False)

result = select_rows(server_context, schema, table)
if result is not None:
    print(result['rows'][0])
    print("select_rows: Number of rows returned: " + str(result['rowCount']))
else:
    print('select_rows: Failed to load results from ' + schema + '.' + table)

Supported Versions

Python 2.6+ and 3.4+ are fully supported. LabKey Server v15.1 and later.

Contributing

This package is maintained by LabKey. If you have any questions or need support, please use the LabKey Server support forum.

Testing

If you are looking to contribute please run the tests before issuing a PR. For now you need to manually get the dependencies:

$ pip install mock

Then, to run the tests:

$ python test/test_labkey.py