Convert an integer to a string

numberformat.py

from django.template import Library


register = Library()


@register.filter(is_safe=True)
def intdivide(value, separator=','):
    """
    Convert an integer to a string containing specific separator every three digits.
    For example, 3000 becomes '3,000' and 45000 becomes '45,000'.
    """
    value = str(value)
    divide = len(value) % 3
    new_value = str()
    for idx, val in enumerate(value):
        if idx != 0 and idx == divide:
            new_value += separator
        elif idx != 0 and (idx - divide) % 3 == 0:
            new_value += separator
        new_value += val
        idx += 1
    return new_value


if __name__ == '__main__':
    print(intdivide(1, ' '))
    print(intdivide(12, ' '))
    print(intdivide(123, ' '))
    print(intdivide(1234, ' '))
    print(intdivide(12345, ' '))
    print(intdivide(123456, ' '))
    print(intdivide(1234567, ' '))
    print(intdivide(12345678, ' '))
    print(intdivide(123456789, ' '))
    print(intdivide(1234567890, ' '))
    print(intdivide(12345678901, ' '))
    print(intdivide(123456789012, ' '))
    print(intdivide(1234567890123, ' '))
    print(intdivide(12345678901234, ' '))
    print(intdivide(123456789012345, ' '))