decimal_create.py

#!/usr/bin/env python

# credit for this goes to the author
# of The Python Standard Library by example
# Jesse Noller, Python Core Developer and PSF Board Member
# Book can be purchased on amazon, it is also
# on the oreilly bookshelf and may be at your
# library. I'm only reprinting the code example
# here because I'm working on this stuff as a
# student of the Python Programming language.
# Thanks Jesse Noller for such a good book.

import decimal

fmt = '{0:<25} {1:<25}'
print fmt.format('Input', 'Output')
print fmt.format('-' * 25, '-' * 25)

# Integer
print fmt.format(5, decimal.Decimal(5))

# String
print fmt.format('3.14', decimal.Decimal('3.14'))

# Float
f = 0.1
print fmt.format(repr(f), decimal.Decimal(str(f)))
print fmt.format('%23g' % f,
                 str(decimal.Decimal.from_float(f))[:25])