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pandas-ml-utils

Master repository for the pandas-ml modules

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Pandas Machine Learning and Quant Finance Library Collection

Python
3.8 NOX Tests Status Spelling

Whether it is some statistical analysis or machine learning, most likely it all starts with a DataFrame. But soon enough you will find yourself converting your data frames to numpy, splitting arrays, applying min max scalers, lagging and concatenating columns etc. As a result your notebook looks messy and became and unreadable beast. Yet the mess becomes only worse once you start to deploy your research into a productive application. Now the untested hard coded data pipelines need to be maintained at two places.

The aim of this library is to conveniently operate with data frames without and abstract away the ugly unreproducible data pipelines. The only thing you need is the original unprocessed data frame where you started.

Fitting Example You find this demo in the pytorch examples

The data pipeline becomes a part of your model and gets saved that way. Going into production is as easy as this:


import pandas as pd
import pandas_ml_utils  # monkey patch the `DataFrame`
from pandas_ml_utils import Model
# alternatively as a one liner `from pandas_ml_utils import pd, Model` 

model = Model.load('your_saved.model')
df = pd.read_csv('your_raw_data.csv')
df_prediction = df.model.predict(model)

# do something with your prediction
df_prediction.plot()

Project Structure

The project is divided into several sub modules where each module could have its own life-cycle. It is definitely an option to move the modules into their own repository in the future if there will be dedicated contributors.

The submodules are:

  • pandas-ml-1ntegration-test more complex tests involving several modules and eventually external data
  • pandas-ml-airflow a very experimental module to integrate models within apache airflow
  • pandas-ml-common functionalities around data access and preparation like train/test splitting, cross validation, ...
  • pandas-ml-quant enhancing pandas-ml-utils for modeling financial timeseries
  • pandas-ml-quant-rl very experimental module for reinforcement learning
  • pandas-ml-utils core module to train models directly from a pandas data frame
  • pandas-ml-utils-keras deprecated module, might be revoked using tensorflow probability
  • pandas-ml-utils-torch pytorch module for machine learning
  • pandas-quant-data-provider easy wrapper around data providers like yahoo and investpy
  • pandas-ta-quant technical analysis functionality like TA-Lib
  • pandas-ta-quant-plot plotting library to simulate state of the art financial plots (also very early stage)

pandas-ml-common

This module contains helpers and utilities for the most common tasks like:

  • splitting data and generation of cross validation data sets
  • nesting and unnesting of multi dimensional column data like images or geodata
  • helpers for pandas MultiIndexes
  • dependency injection
  • data serialization

pandas-ml-utils

The main abstraction layer for data selection, preparation and modelling. The core object is the FeaturesAndLabels definition. Very high level your models will look something along the lines:

from pandas_ml_utils import pd

df = pd.DataFrame({})
with df.model('file_name') as m:
    # use a context manager and import all your dependencies locally 
    # and create all objects needed for your model
    # this makes sure when you save (pickle) your model that it can load conveniently without polluting
    # your global name space   
    from pandas_ml_utils import SkModel, FeaturesAndLabels, FittingParameter, RegressionSummary, naive_splitter
    from sklearn.neural_network import MLPRegressor

    fit = m.fit(
        SkModel(
            MLPRegressor(activation='tanh', hidden_layer_sizes=(60, 50), random_state=42, max_iter=2),
            FeaturesAndLabels(
                features=[
                    "some_column",
                    lambda df: df["some_column"].apply(lambda x: "some calculation"),
                ],
                labels=[
                    lambda df: df["some_column"].apply(lambda x: "some calculation")
                ]
            ),
            summary_provider=RegressionSummary
        ),
        FittingParameter(naive_splitter())
    )

 
fit  # finally just return fit as the `Fit` object implements `_repr_html_()` which renders a nice report

Before a model can be developed, features need to be selected.

df.model.feature_selection(
    FeaturesAndLabels(
        features=[...],
        labels=[...]
    )
)

Check this demo from the examples:

Classification Example

pandas-ml-utils-torch

Extends the pandas-ml-utils library for the use of pytorch models

pandas-ml-utils-keras

Extends the pandas-ml-utils library for the use of keras tensorflow 1.x models.

NOTE! This module is currently stalled as I mainly use pytorch at the moment.

pandas-ml-quant

...

pandas-ta-quant

Technical analysis library.

It is a pure python re-implementation of the famous TA-Lib and some custom indicators on top i.e. GARCH. Use df.ta.help to see all possible indicators. Ta Plot

pandas-ta-quant-plot

Charting library

Ta Plot

pandas-ml-quant-data-provider

This is mainly a wrapper around data providing libraries yfinance or investpy

Testing and experiments

There are some more not published libraries used for testing and experiments.

Installation

Currently, all libraries are somewhat entangled and will hike parallel the releases cycles. This dependency will weaken up as we reach more stable release.

pip install pandas-ml-common pandas-ml-utils pandas-ml-utils-torch\
 pandas-ta-quant pandas-ml-quant\
 pandas-quant-data-provider pandas-ta-quant-plot

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