how to increase precision to double in python 3 code example

Example 1: fixed precision float python

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

Example 2: w=how to tell if decimal in python

i = 100
f = 1.23

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