README.md

Polyfills - `stdlib`

Backporting of some of the features natively available in newer Python versions:

bool class (as well as True and False)
sorted() function (Python 2.4)
sum() function (Python 2.3)
enumerate() function (Python 2.3)
print() function (keyword arguments such as end or sep were added in Python 3.3, see module docstring for more details)
NotImplementedError exception (Python 2.2)
set() class (Python 2.4)

For a quick one-time workaround for True and False:
exec("try: (True, False)\nexcept NameError: exec('True = 1==1; False = 1==0')")