pydeephaven 0.5.2

The Deephaven Python Client

Deephaven Python Client

Deephaven Python Client is a Python package created by Deephaven Data Labs. It is a client API that allows Python applications to remotely access Deephaven data servers.

Source Directory

From the deephaven-core repository root

(clone from https://github.com/deephaven/deephaven-core)

$ cd pyclient

Dev environment setup

$ pip3 install -r requirements.txt

Build

$ python3 setup.py bdist_wheel

Run tests

$ python3 -m unittest discover tests

Run examples

$ python3 -m examples.demo_table_ops
$ python3 -m examples.demo_query
$ python3 -m examples.demo_run_script
$ python3 -m examples.demo_merge_tables
$ python3 -m examples.demo_asof_join

Install

$ pip3 install dist/pydeephaven-0.5.2-py3-none-any.whl

Quick start

    >>> from pydeephaven import Session
    >>> session = Session() # assuming Deephaven Community Edition is running locally with the default configuration
    >>> table1 = session.time_table(period=1000000).update(formulas=["Col1 = i % 2"])
    >>> df = table1.snapshot().to_pandas()
    >>> print(df)
                        Timestamp  Col1
    0     1629681525690000000     0
    1     1629681525700000000     1
    2     1629681525710000000     0
    3     1629681525720000000     1
    4     1629681525730000000     0
    ...                   ...   ...
    1498  1629681540670000000     0
    1499  1629681540680000000     1
    1500  1629681540690000000     0
    1501  1629681540700000000     1
    1502  1629681540710000000     0

    >>> session.close()

Related documentation

• https://deephaven.io/
• https://arrow.apache.org/docs/python/index.html

API Reference

[start here] https://deephaven.io/core/client-api/python/