DataReady 🧹

ML dataset quality scanner, scorer, and auto-fixer — in 3 lines of code.

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DataReady scans your CSV/DataFrame for 20+ data quality issues, scores it 0–100, and interactively fixes problems — before you train your ML model.

import pandas as pd
from dataready import DataReady

df = pd.read_csv("data.csv")
dr = DataReady(df, target_col="label")
dr.scan()
clean_df = dr.fix()

That's it.

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Why DataReady?

Most ML bugs come from dirty data — missing values, ID columns accidentally left in, boolean columns stored as "yes"/"no" strings, outliers that skew your model. DataReady catches all of these before training, not after.

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Installation

pip install dataready

Requirements: Python ≥ 3.9, pandas ≥ 1.5, numpy ≥ 1.23

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Quick Start

import pandas as pd
from dataready import DataReady

df = pd.read_csv("student_performance.csv")
dr = DataReady(df, target_col="passed")

# 1. Scan — prints a full quality report in the terminal
dr.scan()

# 2. Fix — interactive prompt before each fix
clean_df = dr.fix()

# 3. Or auto-approve all fixes
clean_df = dr.fix(auto_approve=True)

# 4. Export a standalone HTML report
dr.export_report("report.html")

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What It Detects

Issue	Severity	Auto-Fix
Missing values	warning / critical	✅ Median / mode imputation, drop if >80% null
Duplicate rows	warning / critical	✅ Drop duplicates
Outliers (IQR)	warning / critical	✅ Winsorization
High skewness	warning / critical	✅ log1p transform
ID / key columns	warning	✅ Drop column
Single-value columns	critical	✅ Drop column
Near-zero variance	warning	✅ Drop column
High cardinality	warning	✅ Group rare categories as "Other"
Numeric stored as string	warning	✅ Convert to float64
Boolean stored as string	info	✅ Convert to bool
Datetime stored as string	info	✅ Convert to datetime64
Mixed types in column	warning	✅ Cast to string
High correlation (multicollinearity)	warning	✅ Drop redundant column
Leading/trailing whitespace	info	✅ Strip whitespace
Encoding corruption	warning	✅ Remove corrupt characters
Class imbalance	warning / critical	❌ Manual (SMOTE / class weights)
Data leakage	critical	✅ Drop leaking column

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Quality Score

Every dataset gets a 0–100 quality score with a letter grade:

Score	Grade	Label
100	A+	Perfect — ML-ready
90–99	A	Excellent
75–89	B	Good — minor issues
60–74	C	Fair — needs attention
40–59	D	Poor — significant cleaning needed
< 40	F	Critical — major work required

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Terminal Output Example

============================================================
  DataReady — Dataset Quality Report
============================================================
  Shape   : 500 rows × 11 columns
  Issues  : 5 found

  Quality Score
  86.0 / 100  [█████████████████░░░]  Grade: B
  Good — minor issues to address

  [WARNING] — 2 issue(s)
  1. 'parent_education' has 117 missing values (23.4%)
  2. 'student_id' is an ID/key column (500 unique, 100% unique)

  [INFO] — 3 issue(s)
  1. 'internet_access' looks boolean but stored as string
  2. 'extracurricular' looks boolean but stored as string
  3. 'passed' looks boolean but stored as string
============================================================
  5 of 5 issues are auto-fixable. Call .fix() to apply.
============================================================

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HTML Report

dr.export_report("report.html")

Opens in any browser. Includes score, grade, all issues, score breakdown, and a column-by-column detail table.

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API Reference

dr = DataReady(df, target_col=None, use_color=True)

dr.scan()                        # run checks, print report → returns self
dr.fix(auto_approve=False)       # interactive or auto fix → returns clean DataFrame
dr.export_report("report.html")  # save HTML report → returns path
dr.score()                       # → dict {score, grade, label, breakdown}
dr.issues()                      # → list of Issue objects
dr.summary()                     # print one-line summary

target_col

Optional. Enables two extra checks:

• Class imbalance — is your target unevenly distributed?
• Data leakage — is any feature suspiciously correlated with the target?

Advanced: scan only specific columns

feature_cols = ["age", "score", "income", "label"]
dr = DataReady(df[feature_cols], target_col="label")

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Interactive Fixer

  [1/5] WARNING: 'parent_education' has 117 missing values (23.4%)
  Apply this fix? [y]es / [n]o / [a]ll / [q]uit :

• y — apply this fix
• n — skip this fix
• a — apply this and all remaining fixes
• q — quit the fixer

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Contributing

Pull requests are welcome! To get started:

git clone https://github.com/yourusername/dataready.git
cd dataready
pip install -e ".[dev]"
pytest tests/

Please open an issue first for major changes.

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License

MIT © 2025 — free to use, modify, and distribute.