decimal in python

>>> from decimal import *
>>> getcontext().prec = 6
>>> Decimal(1) / Decimal(7)
Decimal('0.142857')
>>> getcontext().prec = 28
>>> Decimal(1) / Decimal(7)
Decimal('0.1428571428571428571428571429')

x = 13.949999999999999999
g = float("{:.2f}".format(x))

print("{:.6f}".format(variable_name))

i = 100
f = 1.23

print(type(i))
print(type(f))
# <class 'int'>
# <class 'float'>