pytho how to set default decimal digits code example

Example 1: 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')

Example 2: give answer in 6 decimal python

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