dataprism 0.1.2

A Python library for exploratory data analysis with advanced statistical features

DataPrism

A comprehensive Python library for exploratory data analysis with advanced features for data profiling, quality assessment, and stability monitoring.

Interactive Viewer

DataPrism includes a built-in interactive dashboard to explore your analysis results in the browser.

from dataprism import DataPrism, DataLoader

# Load data from CSV or Parquet
df = DataLoader.load_csv("data.csv")
# df = DataLoader.load_parquet("data.parquet")

# Run analysis and launch viewer
prism = DataPrism()
prism.analyze(
    data=df,
    target_variable="target",
    exclude_columns=["id", "split", "onboarding_date"],
    output_path="eda_results.json",
)
prism.view()

Summary — Dataset overview, insights, top features by IV, data quality score, and provider match rates.

Catalog — Sortable feature table with type, provider, target correlation, IV, and PSI at a glance.

Deep Dive — Per-feature detail view with statistics, violin plots, distribution charts, PSI trend analysis, target associations, and correlations.

Associations — Mixed-method heatmap (Pearson, Theil's U, Eta) showing relationships across all features.

How DataPrism Compares

Feature	DataPrism	Sweetviz	ydata-profiling	AutoViz	D-Tale	DataPrep
Programmatic API	Yes	Yes	Yes	Yes	Yes	Yes
Interactive Viewer	Yes	Yes	Yes	Partial	Yes	Yes
Correlation Analysis	Pearson, Spearman, Theil's U, Eta	Pearson, UC, Eta	Pearson, Spearman, Kendall, Phi-k	Pearson	Pearson, PPS	Pearson, Spearman, Kendall
Histogram / Bar Chart	Yes	Yes	Yes	Yes	Yes	Yes
Box Plot	Yes	—	Yes	—	Yes	Yes
Association Heatmap	Yes	Yes	Yes	—	Yes	Yes
Target-Overlaid Distribution	Yes	Yes	—	—	—	—
Scatter / Pair Plot	—	—	Yes	Yes	Yes	Yes
Violin Plot	Yes	—	—	Yes	—	—
Time Series / Trend	Yes	—	Yes	—	Yes	—
Schema-Driven Analysis	Yes	Partial	Yes	—	Partial	Partial
Mixed-Type Associations	Yes	Yes	Yes	—	Partial	Partial
Structured JSON Export	Yes	—	Yes	—	Partial	—
Target Analysis (IV/WoE)	Yes	—	—	—	—	—
Drift / PSI Stability	Yes	—	—	—	—	—
Data Quality Score	Yes	—	—	—	—	—
Sentinel Value Handling	Yes	—	—	—	—	—
Provider Match Rates	Yes	—	—	—	—	—

Where DataPrism leads: Schema-aware profiling with column roles and sentinel codes, IV/WoE for credit risk, PSI-based stability monitoring (cohort + time-based), automated data quality scoring, and provider-level match rates. No other EDA library covers these out of the box.

Where DataPrism lags: No dataset comparison (train vs test side-by-side), no auto-visualization per feature, and no Spark/Dask support for distributed datasets. These are on the roadmap.

Roadmap

DataPrism is being built for the AI era — where data analysis is increasingly driven by LLM agents, automated pipelines, and programmatic consumers rather than humans clicking through dashboards.

AI-Native Analysis

• LLM-consumable output — Structured JSON output designed for AI agents to read, reason about, and act on. No screen-scraping HTML reports or parsing PDFs.
• Natural language insights — Auto-generated plain-English summaries of each feature, anomalies, and recommendations that LLMs can directly incorporate into reports.
• Agent-friendly API — Minimal, predictable interface (analyze() → view()) that AI coding assistants can invoke without ambiguity. Schema-driven configuration over magic defaults.

Closing the Gaps

• Dataset comparison — Side-by-side train/test/production profiling with automatic drift highlights.
• Scatter & pair plots — Interactive scatter matrices for continuous feature pairs with target coloring.
• Auto-visualization — One-line generation of per-feature visual summaries exportable as images.
• Spark/Dask support — Distributed computation for datasets that don't fit in memory.
• Streaming analysis — Incremental profiling for real-time data pipelines without re-analyzing the full dataset.

Deeper Intelligence

• Automated feature recommendations — Go beyond flagging issues to suggesting transformations (log, binning, encoding) based on distribution shape and target relationship.
• Anomaly explanations — When outliers or drift are detected, surface the likely cause (data pipeline issues, population shift, seasonality).
• Cross-dataset lineage — Track how feature distributions evolve across model versions and data refreshes.

Features

• Automated Feature Analysis — Continuous and categorical profiling with automatic type inference and missing value detection
• Target Relationship Analysis — Information Value (IV), Weight of Evidence (WoE), optimal binning, predictive power classification
• Correlation & Association Analysis — Pearson, Spearman, Theil's U, Eta with unified association matrix across all feature types
• Quality Assessment — Automated scoring (0-10), per-feature quality flags, actionable recommendations
• Sentinel Value Handling — Automatic detection and replacement of no-hit values with nullable type preservation
• Cohort-Based Stability — PSI and KS test for train/test drift detection
• Time-Based Stability — Monthly, weekly, quartile, or custom time windows with temporal trend analysis
• Provider Match Rates — Automatic data coverage statistics by provider
• Large Dataset Support — CSV and Parquet formats, chunked reading, configurable sampling

Installation

pip install dataprism

Quick Start

Basic Usage

from dataprism import DataPrism, DataLoader
import pandas as pd

# Option 1: Load from file using DataLoader
df = DataLoader.load_csv("data.csv")

# Option 2: Use existing DataFrame
df = pd.read_csv("data.csv")  # or from database, etc.

# Initialize prism
prism = DataPrism(
    max_categories=50,
    top_correlations=10
)

# Run analysis (exclude non-feature columns when no schema is available)
results = prism.analyze(
    data=df,
    exclude_columns=["customer_id", "created_at"],
    target_variable="target",
    output_path="eda_results.json"
)

With DatasetSchema

from dataprism import (
    DataPrism, DataLoader,
    ColumnConfig, ColumnType, ColumnRole, Sentinels, DatasetSchema,
)

# Load data and schema
df = DataLoader.load_csv("data.csv")
schema = DataLoader.load_schema("schema.json")

# Or create schema programmatically
schema = DatasetSchema([
    ColumnConfig('age', ColumnType.CONTINUOUS, ColumnRole.FEATURE,
                 provider='demographics', description='User age',
                 sentinels=Sentinels(not_found='-1')),
    ColumnConfig('zip_code', ColumnType.CATEGORICAL, ColumnRole.FEATURE,
                 provider='address', description='ZIP code',
                 sentinels=Sentinels(not_found='', missing='00000')),
    ColumnConfig('target', ColumnType.BINARY, ColumnRole.TARGET),
])

# Run with schema
prism = DataPrism()
results = prism.analyze(
    data=df,
    schema=schema,
    target_variable="target",
    output_path="eda_results.json"
)

Schema JSON format (schema.json):

{
  "columns": [
    {
      "name": "age",
      "type": "continuous",
      "role": "feature",
      "provider": "demographics",
      "description": "User age",
      "sentinels": {
        "not_found": "-1",
        "missing": null
      }
    }
  ]
}

Stability Analysis

Cohort-Based (Train/Test)

from dataprism import DataPrism, DataLoader

# Load data and schema
df = DataLoader.load_parquet("data.parquet")
schema = DataLoader.load_schema("schema.json")

# Configure for stability analysis
prism = DataPrism(
    calculate_stability=True,
    cohort_column='dataTag',
    baseline_cohort='training',
    comparison_cohort='test'
)

results = prism.analyze(
    data=df,
    schema=schema
)

Time-Based

from dataprism import DataPrism, DataLoader

# Load data and schema
df = DataLoader.load_parquet("data.parquet")
schema = DataLoader.load_schema("schema.json")

# Configure for time-based stability
prism = DataPrism(
    time_based_stability=True,
    time_column='onboarding_time',
    time_window_strategy='monthly',  # or 'weekly', 'quartiles', 'custom'
    baseline_period='first',
    comparison_periods='all',
    min_samples_per_period=100
)

results = prism.analyze(
    data=df,
    schema=schema
)

Development

pip install -e .           # Install for development
python -m build            # Build package
python -m pytest tests/    # Run tests

Documentation

• Architecture — internals, module structure, data flow
• Usage Guide — advanced configuration, provider match rates, feature counts reference
• Decision Records — key design decisions and rationale
• Examples — usage examples and demos

Requirements

• Python 3.9+
• pandas >= 2.0.0
• numpy >= 1.24.0
• scipy >= 1.10.0
• pyarrow >= 10.0.0 (for Parquet support)

License

MIT License - see LICENSE file for details.

Contact

For questions or suggestions:

• Email: [e-mail]
• GitHub: https://github.com/lattiq/dataprism

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.