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#!/usr/bin/env python3
import itertools
import logging
# This module is commonly used by others in here and should avoid
# taking any unnecessary dependencies back on them.
logger = logging.getLogger(__name__)
generators = {}
def get(name: str) -> int:
"""
Returns a thread safe monotonically increasing id suitable for use
as a globally unique identifier.
>>> import id_generator
>>> id_generator.get('student_id')
0
>>> id_generator.get('student_id')
1
"""
if name not in generators:
generators[name] = itertools.count()
x = next(generators[name])
logger.debug(f"Generated next id {x}")
return x
if __name__ == '__main__':
import doctest
doctest.testmod()
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