python variable into string code example

Example 1: variable string in string python

>>> shepherd = "Mary"
>>> age = 32
>>> stuff_in_string = "Shepherd {} is {} years old.".format(shepherd, age)
>>> print(stuff_in_string)
Shepherd Mary is 32 years old.

Example 2: how to give a string value variable in python

foo = "bar"
exec(foo + " = 'something else'")
print bar
something else