This library provides functions that allow you to expand a string that contains parenthesis with numeric-values, and then expands that into an actual string value.

$ pip install expand_string

Simple example:

from expand_string import expand_string

expand_string('N3(S)N2(E3(NW))')

Would result in the output:

NSSSNENWNWNWENWNWNW

Shell example:

python -m expand_string 'N3(S)N2(E3(NW))'

Would result in the output:

NSSSNENWNWNWENWNWNW

For more details see the expand_string docstring.