JMBG Python Library

A Python library for validating and parsing Serbian unique master citizen numbers (JMBG - Jedinstveni Matični Broj Građana).

Features

• ✅ Validate JMBG numbers with comprehensive checks
• ✅ Extract birth date, region, and gender information
• ✅ Support for all Serbian regions
• ✅ Calculate age from JMBG
• ✅ Type-safe with Python type hints
• ✅ Fully tested with unittest
• ✅ No external dependencies

Installation

Install via pip:

pip install jmbg-labs

Or clone the repository:

git clone https://github.com/jmbg-labs/python.git
cd python

Usage

Basic Validation

from jmbg import Jmbg, valid

# Quick validation
if valid('0101000710009'):
    print("Valid JMBG")

# Parse and validate
try:
    jmbg = Jmbg.parse('0101000710009')
    print(f"Valid JMBG: {jmbg.format()}")
except JmbgError as e:
    print(f"Invalid JMBG: {e}")

Extract Information

from jmbg import Jmbg

jmbg = Jmbg('0101000710009')

# Get birth date
date = jmbg.get_date()  # datetime.date object
print(date.strftime('%Y-%m-%d'))  # 2000-01-01

# Get age
print(jmbg.get_age())  # e.g., 26

# Check gender
if jmbg.is_male():
    print("Male")

if jmbg.is_female():
    print("Female")

# Access individual parts
print(jmbg.day)           # 1
print(jmbg.month)         # 1
print(jmbg.year)          # 2000
print(jmbg.region)        # 71
print(jmbg.region_text)   # "Belgrade"
print(jmbg.country)       # "Serbia"
print(jmbg.unique)        # 0
print(jmbg.checksum)      # 9

Using Built-in Methods

jmbg = Jmbg('1505995800002')

# String conversion
print(str(jmbg))  # "1505995800002"
print(jmbg.format())  # "1505995800002"

# Property access
print(jmbg.original)        # "1505995800002"
print(jmbg.day_original)    # "15"
print(jmbg.month_original)  # "05"
print(jmbg.year_original)   # "995"
print(jmbg.region_original) # "80"
print(jmbg.unique_original) # "000"

# Check adult status
if jmbg.is_adult():
    print("Adult (18+)")

JMBG Format

JMBG consists of 13 digits: DDMMYYYRRBBBC

• DD - Day of birth (01-31)
• MM - Month of birth (01-12)
• YYY - Year of birth (last 3 digits)
• RR - Region code
• BBB - Unique number (000-499 for males, 500-999 for females)
• C - Checksum digit

Supported Regions

The library supports all Serbian and ex-Yugoslav regions including (beware: ex-Yugoslav regions codes may have changed since the breakup):

• Serbia (71-79): Belgrade, Kragujevac, Niš, etc.
• Serbia/Vojvodina (80-89): Novi Sad, Subotica, Pančevo, etc.
• Serbia/Kosovo (91-96): Priština, Peć, Prizren, etc.
• Bosnia and Herzegovina (10-19)
• Montenegro (21-29)
• Croatia (30-39)
• Macedonia (41-49)
• Slovenia (50)

Validation Rules

The library performs comprehensive validation:

1. Length check - Must be exactly 13 digits
2. Format check - Must contain only numeric characters
3. Date validation - Birth date must be valid (including leap year support)
4. Region validation - Region code must exist in the registry
5. Checksum validation - Modulo 11 algorithm verification

Development

Running Tests

# Run all tests
python -m unittest discover

# Run specific test file
python -m unittest test_jmbg

# Run tests with verbose output
python -m unittest test_jmbg -v

Code Style

# Format code with black
black .

# Check types with mypy
mypy jmbg.py

Requirements

• Python ^3.8
• No external dependencies (for production use)

Contributing

Contributions are welcome! Please ensure:

1. All tests pass (python -m unittest discover)
2. Code follows PEP 8 standards
3. Add tests for new features
4. Update documentation as needed

License

This project is licensed under the MIT License - see the LICENSE file for details.

Credits

Developed by JMBG Labs

Support

• 🐛 Report Issues
• 📖 Source Code

Examples

Validate Multiple JMBGs

from jmbg import Jmbg, valid

jmbgs = ['0710003730015', '1705978730032', 'invalid']

for jmbg_string in jmbgs:
    if valid(jmbg_string):
        jmbg = Jmbg.parse(jmbg_string)
        print(f"{jmbg.format()} - Born: {jmbg.get_date()}, "
              f"Region: {jmbg.region_text}, "
              f"Gender: {'Male' if jmbg.is_male() else 'Female'}")
    else:
        print(f"{jmbg_string} - Invalid")

Age Calculation

from jmbg import Jmbg

jmbg = Jmbg('0710003730015')
age = jmbg.get_age()

if age >= 18:
    print("Adult")
else:
    print("Minor")

Error Handling

from jmbg import Jmbg
from jmbg_error import JmbgError

try:
    jmbg = Jmbg('1234567890123')
except JmbgError as e:
    # Handle specific validation errors
    print(f"Validation failed: {e}")
    # Possible messages:
    # - "JMBG string must have exactly 13 digits, got X"
    # - "JMBG must contain only numeric characters"
    # - "Date 'DD/MM/YYYY' is not valid"
    # - "Region 'XX' is not valid for JMBG"
    # - "Checksum is not valid"

Working with Gender

from jmbg import Jmbg
from gender import Gender

jmbg = Jmbg('0710003730015')

# Get gender enum
gender = jmbg.gender()
if gender == Gender.MALE:
    print("Male")
elif gender == Gender.FEMALE:
    print("Female")

# Or use convenience methods
print(jmbg.is_male())    # True
print(jmbg.is_female())  # False

Date Operations

from jmbg import Jmbg
import datetime

jmbg = Jmbg('2902992710005')  # Leap year date
birth_date = jmbg.get_date()

# Calculate days until next birthday
today = datetime.date.today()
next_birthday = datetime.date(today.year, birth_date.month, birth_date.day)
if next_birthday < today:
    next_birthday = datetime.date(today.year + 1, birth_date.month, birth_date.day)

days_until = (next_birthday - today).days
print(f"Days until birthday: {days_until}")