indpy-core 0.1.7

A comprehensive library for Indian Identity and Financial data validation.

indpy 🇮🇳

indpy is a comprehensive Python library for validating and generating Indian government documents and financial identifiers. It uses official checksum algorithms (GSTIN Mod-36, Aadhaar Verhoeff) where applicable and provides regex-based structural validation for all document types.

🚀 Features

✅ Validation (14 Document Types)

• PAN: Permanent Account Number (5 letters + 4 digits + 1 letter)
• TAN: Tax Deduction and Collection Account Number (4 letters + 5 digits + 1 letter)
• Driving License (DL): State + RTO + Year + serial number (15 characters)
• GSTIN: GST Identification Number (with Mod-36 checksum verification)
• Aadhaar: 12-digit unique identity (with Verhoeff checksum algorithm)
• Voter ID (EPIC): Electoral ID (3 letters + 7 digits)
• Passport: Passport number (1 letter + 7 digits)
• Mobile: Indian 10-digit format (starts with 6–9)
• IFSC: Bank branch code (4 letters + 0 + 6 alphanumeric)
• Vehicle (RC): Registration certificate (state code + regional code + registration)
• UPI: Unified Payments Interface handle
• CIN: Corporate Identification Number (21-character corporate format)
• Pincode: Indian postal code (6 digits, no leading zero)
• Credit Card: 13–19 digit card numbers (with Luhn Mod-10 checksum)

🎲 Data Generation (11 Mock Data Generators)

• Generate valid PAN numbers with realistic format
• Generate valid TAN numbers
• Generate valid Driving License numbers
• Generate valid mobile numbers (6–9 prefix)
• Generate valid Aadhaar numbers with mathematically correct Verhoeff checksum
• Generate Voter ID numbers
• Generate Passport numbers
• Generate Vehicle registration numbers
• Generate CIN numbers
• Generate Pincode numbers
• Generate valid Visa-format credit card numbers (Luhn checksum)

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📦 Installation

Install from PyPI:

pip install indpy_core

Note: The package name on PyPI is indpy_core, but you import it in Python as indpy.

Install for local development:

# Clone the repository
git clone https://github.com/harshgupta2125/Indpy.git
cd Indpy
pip install -e .

💻 Usage

1️⃣ Python — Validation

from indpy import (
    is_pan, is_gstin, is_vehicle, is_aadhaar, is_voterid, 
   is_passport, is_mobile, is_ifsc, is_upi, is_cin, is_pincode,
   is_credit_card, is_tan, is_dl
)

# Validate PAN (Permanent Account Number)
print(is_pan("ABCDE1234F"))  # True

# Validate TAN
print(is_tan("DELM12345L"))  # True

# Validate Driving License
print(is_dl("MH1220140001234"))  # True

# Validate GSTIN (includes official Mod-36 checksum)
print(is_gstin("29ABCDE1234F1Z5"))  # True/False based on checksum

# Validate Aadhaar (12-digit with Verhoeff checksum algorithm)
print(is_aadhaar("379980670385"))  # True/False based on Verhoeff

# Validate Voter ID (EPIC format)
print(is_voterid("ABC1234567"))  # True

# Validate Passport
print(is_passport("A1234567"))  # True

# Validate Mobile number (Indian format, 6-9 prefix)
print(is_mobile("9876543210"))  # True

# Validate IFSC code (Bank branch)
print(is_ifsc("SBIN0004321"))  # True

# Optional: enforce known bank codes
known_banks = {"SBIN", "HDFC", "ICIC"}
print(is_ifsc("SBIN0004321", valid_bank_codes=known_banks))  # True

# Validate Vehicle registration number
print(is_vehicle("DL01CA1234"))  # True

# Validate UPI handle
print(is_upi("user@paytm"))  # True

# Validate CIN (Corporate Identification Number)
print(is_cin("L99999MH2014PLC241895"))  # True

# Validate Pincode (6 digits, no leading zero)
print(is_pincode("560034"))  # True

# Validate Credit/Debit Card (Luhn Mod-10)
print(is_credit_card("4111 1111 1111 1111"))  # True

2️⃣ Python — Generating Mock Data

from indpy import Generate

# Generate random PAN
print(Generate.pan())      # e.g. "BPLPZ5821K"

# Generate random TAN
print(Generate.tan())      # e.g. "DELM12345L"

# Generate random Driving License
print(Generate.dl())       # e.g. "MH1220140001234"

# Generate random mobile number
print(Generate.mobile())   # e.g. "9876123450"

# Generate random Aadhaar (with mathematically valid Verhoeff checksum)
print(Generate.aadhaar())  # e.g. "379980670385"

# Generate random Voter ID
print(Generate.voterid())  # e.g. "ABC1234567"

# Generate random Passport
print(Generate.passport()) # e.g. "A1234567"

# Generate random Vehicle registration
print(Generate.vehicle())  # e.g. "DL04CA9921"

# Generate random CIN
print(Generate.cin())      # e.g. "L12345AB2024PLC123456"

# Generate random Pincode
print(Generate.pincode())  # e.g. "560034"

# Generate random Credit Card (Visa-like, Luhn-valid)
print(Generate.credit_card())  # e.g. "4532123456781234"

3️⃣ Command Line Interface

Check version:

indpy --version
# Output: 0.1.7

Validate a document:

# Validate PAN
indpy check pan ABCDE1234F
# Output: ✅ PAN Validation Result: True

# Validate TAN
indpy check tan DELM12345L
# Output: ✅ TAN Validation Result: True

# Validate Driving License
indpy check dl MH1220140001234
# Output: ✅ DL Validation Result: True

# Validate Aadhaar
indpy check aadhaar 379980670385
# Output: ✅ AADHAAR Validation Result: True

# Validate Voter ID
indpy check voterid ABC1234567
# Output: ✅ VOTERID Validation Result: True

# Validate Passport
indpy check passport A1234567
# Output: ✅ PASSPORT Validation Result: True

# Validate CIN
indpy check cin L99999MH2014PLC241895
# Output: ✅ CIN Validation Result: True

# Validate Pincode
indpy check pincode 560034
# Output: ✅ PINCODE Validation Result: True

# Validate Credit Card
indpy check credit_card 4111111111111111
# Output: ✅ CREDIT_CARD Validation Result: True

Generate mock data:

# Generate PAN
indpy gen pan
# Output: ABCDE1234F

# Generate TAN
indpy gen tan
# Output: ABCD12345E

# Generate Driving License
indpy gen dl
# Output: MH1220140001234

# Generate Aadhaar
indpy gen aadhaar
# Output: 379980670385

# Generate Vehicle
indpy gen vehicle
# Output: DL04CA9921

# Generate Voter ID
indpy gen voterid
# Output: ABC1234567

# Generate Passport
indpy gen passport
# Output: A1234567

# Generate CIN
indpy gen cin
# Output: L12345AB2024PLC123456

# Generate Pincode
indpy gen pincode
# Output: 560034

# Generate Credit Card
indpy gen credit_card
# Output: 4XXXXXXXXXXXXXXX

🛠️ Supported Documents

Document	Regex Pattern	Checksum	Notes
PAN	^[A-Z]{5}[0-9]{4}[A-Z]$	Structure only	10-character format
TAN	^[A-Z]{4}[0-9]{5}[A-Z]$	Structure only	TDS/TCS account number
Driving License	^[A-Z]{2}[0-9]{2}[0-9]{4}[0-9]{7}$	N/A	Sarathi-style 15-character format
GSTIN	^[0-9]{2}[A-Z]{5}[0-9A-Z]{9}[0-9]$	Mod-36	15-character GST ID
Aadhaar	^[2-9]\d{11}$	Verhoeff	12-digit unique ID
Voter ID	^[A-Z]{3}[0-9]{7}$	N/A	EPIC format
Passport	^[A-Z][0-9]{7}$	N/A	8-character format
Mobile	^[6-9]\d{9}$	N/A	10-digit Indian number
IFSC	^[A-Z]{4}0[A-Z0-9]{6}$	N/A	Bank branch code
Vehicle	^[A-Z]{2}\d{1,2}[A-Z]{1,2}\d{1,4}$	N/A	State code + registration
UPI	^[a-zA-Z0-9.\-_]+@[a-zA-Z]+$	N/A	Payment handle
CIN	^[A-Z][0-9]{5}[A-Z]{2}[0-9]{4}[A-Z]{3}[0-9]{6}$	N/A	Corporate ID (21-char)
Pincode	^[1-9]\d{5}$	N/A	6-digit postal code
Credit Card	^\d{13,19}$	Luhn (Mod-10)	Global card checksum standard
� Testing

Run the comprehensive test suite:

# Run all tests
python3 -m pytest tests/

# Run specific test file
python3 -m pytest tests/test_lib.py -v

# Run with coverage
python3 -m pytest tests/ --cov=indpy

Test files include:

• test_lib.py: Comprehensive tests for all 14 validators and 11 generators
• Coverage includes structural validation, checksum algorithms, and edge cases

🤝 Contributing

Contributions are welcome! Typical workflow:

1. Fork the repository
2. Create a feature branch:

   git checkout -b feature/NewValidator
   

3. Add your validator to indpy/validators.py
4. Add corresponding generator to indpy/generators.py
5. Update indpy/init.py to export new functions
6. Add tests to tests/test_lib.py
7. Commit with clear message:

   git commit -m "Add new validator for [document type]"
   

8. Push and open a pull request

Code Style:

• Follow PEP 8 standards
• Add comprehensive docstrings with regex patterns
• Include usage examples in docstrings
• Test coverage for all new validators

📚 API Reference

All validators return a boolean (True/False). All generators return a string.

Validators

is_pan(pan: str) -> bool
is_tan(tan: str) -> bool
is_dl(dl: str) -> bool
is_gstin(gstin: str) -> bool
is_aadhaar(aadhaar: str) -> bool
is_voterid(voterid: str) -> bool
is_passport(passport: str) -> bool
is_mobile(mobile: str) -> bool
is_ifsc(ifsc: str) -> bool
is_vehicle(vehicle: str) -> bool
is_upi(upi: str) -> bool
is_cin(cin: str) -> bool
is_pincode(pincode: str) -> bool
is_credit_card(card_number: str) -> bool

Generators

Generate.pan() -> str
Generate.tan() -> str
Generate.dl() -> str
Generate.gstin() -> str  # Note: Does not generate checksum
Generate.aadhaar() -> str  # With valid Verhoeff checksum
Generate.voterid() -> str
Generate.passport() -> str
Generate.mobile() -> str
Generate.vehicle() -> str
Generate.cin() -> str
Generate.pincode() -> str
Generate.credit_card() -> str

📄 License

Distributed under the MIT License. See LICENSE for details.

📊 Project Status

Version: 0.1.7

🆕 What's New in 0.1.7

• Added TAN validator: is_tan(...)
• Added Driving License validator: is_dl(...)
• Added generators: Generate.tan() and Generate.dl()
• Added CLI support:
  • indpy check tan <number>
  • indpy check dl <number>
  • indpy gen tan
  • indpy gen dl
• Updated tests and documentation for both features

🆕 What's New in 0.1.6

• Added credit/debit card validation via Luhn (Mod-10): is_credit_card(...)
• Added valid Visa-style test card generation: Generate.credit_card()
• Added CLI support:
  • indpy check credit_card <number>
  • indpy gen credit_card
• Updated tests and documentation for new validator and generator

Features:

• ✅ 14 document validators (all functional)
• ✅ 11 mock data generators (production-ready)
• ✅ Official checksum algorithms (Verhoeff, Mod-36, Luhn)
• ✅ Comprehensive documentation with regex patterns
• ✅ CLI support for validation and generation
• ✅ PEP 8 compliant codebase
• ✅ Full test coverage

Roadmap:

• Add Enrollment ID (UID) validator
• Add GST Certificate validator
• Add international passport format support

git add README.md
git commit -m "Update README formatting"
git push origin main